---Table of Contents---
,,Tricks
,,,,,Single Player
,,,,,,,,,,Warthog jump
,,,,,,,,,,In a Warthog jump
,,,,,,,,,,Stationary shield jump
,,,,,,,,,,Double Jump
,,,,,,,,,,Disappearing dropships
,,,,,,,,,,Weapon switch
,,,,,,,,,,Infinite ammo
,,,,,,,,,,Disappearing plasma grenade
,,,,,,,,,,Jumping into rocks
,,,,,,,,,,In Pelican cockpits
,,,,,,,,,,Jumping high with a ghost
,,,,,,,,,,Freezing enemies
,,,,,,,,,,Falling through the ground
,,,,,,,,,,Flares
,,,,,,,,,,Dirt from nowhere
,,,,,,,,,,Invincibility
,,,,,,,,,,Headless MC, PoA
,,,,,,,,,,Outside the shield charger, PoA
,,,,,,,,,,Under Cpt. Keyes, PoA
,,,,,,,,,,Three weapons in PoA
,,,,,,,,,,Under the light bridge, Halo
,,,,,,,,,,Inside light bridge hole, Halo
,,,,,,,,,,Bypass the red elites, Halo
,,,,,,,,,,Top of Halo (two ways)
,,,,,,,,,,Bottom of Halo
,,,,,,,,,,MC falls to death in cutscene, Halo
,,,,,,,,,,MC attacked in cutscene, T&R
,,,,,,,,,,Warthog in the main facility, SC
,,,,,,,,,,Bottom of the main facility, SC
,,,,,,,,,,Descending the security shaft, SC
,,,,,,,,,,Marines never stop shooting, SC
,,,,,,,,,,Don't deactivate the security system, SC (two ways)
,,,,,,,,,,Free grenades, SC
,,,,,,,,,,Automatically kill the gold elite, SC
,,,,,,,,,,Warthog through the tree barrier, SC
,,,,,,,,,,Top of the Silent Cartographer
,,,,,,,,,,Stay in Pelican, AotCR
,,,,,,,,,,Floating plasma grenade, AotCR
,,,,,,,,,,Jumping between bridges, AotCR, Two Betrayals
,,,,,,,,,,No enemies, AotCR (three ways)
,,,,,,,,,,Two crashed Pelicans, AotCR
,,,,,,,,,,Early banshee, AotCR
,,,,,,,,,,Into the Control Room with no cutscene, AotCR
,,,,,,,,,,Bottomless tree, AotCR
,,,,,,,,,,Off the land bridge, AotCR
,,,,,,,,,,Unresponsive enemies, AotCR
,,,,,,,,,,MC killed in cutscene, AotCR
,,,,,,,,,,MC attacked and killed in cutscene, AotCR
,,,,,,,,,,On top of 343 GS
,,,,,,,,,,Floating assault rifles, GS
,,,,,,,,,,Mysterious marine, GS
,,,,,,,,,,Auto-death, Two Betrayals
,,,,,,,,,,No enemies, Two Betrayals
,,,,,,,,,,Sniping wraith driver, Two Betrayals
,,,,,,,,,,Beginning of AotCR, Two Betrayals
,,,,,,,,,,Across the gap in Keyes
,,,,,,,,,,Fast banshees, Keyes
,,,,,,,,,,Outside of the PoA, The Maw
,,,,,,,,,,Play with "Revert to save" screen, The Maw
,,,,,,,,,,Inside the vent core, The Maw
,,,,,,,,,,Bottom of the Maw jump

-Single Player-

[Warthog jump]
Build a pile of grenades, park a Warthog on top, and detonate them to get vehicles (not just Warthogs) to places they weren't supposed to be.

[In a Warthog jump]
Jump into the gunner seat of a Warthog just before it's launched (during a Warthog jump) to take a ride. Hop in after the first grenade explodes, but before the rest chain react. Can be pretty tricky.

[Stationary shield jump]
*See "Don't leave the ship, Keyes* for details.

[Double Jump]
Crouch at the top of a jump to get a little extra height.

[Disappearing dropships]
This isn't really a trick, but it's interesting nonetheless. All dropships throughout the game are meant to fly to a place and get there before you can. Upon reaching that point, they disappear. However, you can use certain tricks to speed up your journey and you can actually see the dropship (either Covenant or a Pelican) disappear. Some places to see this are:

The beginning of SC. Once out of the Pelican, run straight ahead and don't stop. You should get far enough that when the second Pelican flies around the bend, you can see it disappear.

AotCR: Get the "early Banshee" and fly to the second chasm (the room with the giant pillar). A Covenant dropship should land and drop of some enemies and two Ghosts. When it flies away, follow it as closely as you can. When it reaches the tank barrier, past a small frozen lake, it will disappear.

Also, if you are in a Pelican you're not supposed to be in (like if you stay in the Pelican at the beginning of 343GS, or the Pelican that drops off the marines in AotCR), it won't disappear. The Pelican is not supposed to crash, but with you in it, it can't disappear, so it's engine stops running and just sort of floats downwards and lands.

[Weapon Switch]
You need two controllers. Go into any level in single player, with either controller (called Controller 1 for now). Hit a checkpoint, save and quit. Make note of what weapon you had.

With the other controller, go back into that profile and pick up a different weapon (other than the one you saved with in the previous step). Hit a checkpoint, save and quit.

Pick Controller 1 back up again, and go into the same profile. The skin of your weapon should be that of the first time you saved, but it will have the characteristics of the gun in the second save.

Note: This does not mean that an AR will fire rockets. The rocket launcher (if that was your second weapon), just looks like an assault rifle, and does not fire automatically. This glitch will go away if you switch weapons, swap weapons, die, etc.

[Infinite ammo]
This trick has no real tactical value, but it's a trick nonetheless. Pick up a weapon that uses clips, try the assault rifle first. Find another weapon on the ground that you can pick up. Fire the assault rifle until it's down to two or three bullets, then make note of how many clips you have left. Reload the assault rifle, but just before MC removes the clip from the gun, pick up the other gun in front of you. Pick the assault rifle back up. It should have the same number of clips, but it will have 60 shots left again.

[Disappearing plasma grenade]
You can do this two ways, although both ways are completely different from each other when it comes to why it happens.

Method 1: Find an invisible wall and throw a plasma grenade on it. It will stick, but instead of exploding will just disappear.

Method 2: Go to AotCR. Head into one of the hallways with a load zone and a checkpoint. Memorize the locations of the load points (they're on two black tiles). Now, run towards a load point, jump, and just before or right as you cross the load point, throw a grenade. It will disappear a second after thrown.

[Jumping into rocks]
There are some rocks throughout the game that, when you exit a Warthog close enough to them, you'll end up inside it. I've only tried it from the gunner seat, but others may work, as well. One of the rocks that can be jumped into is in Blood Gulch. It's near the middle of the level, but a bit closer to red base. It's defining feature is it's slanted greatly. Park a Warthog back up against the front of the rock (the side highest in the air). Then get out, and get in the gunner seat. Turn the gun slightly to the left and jump out. You should either land inside the rock or hit the side of the rock. If you're not in, get back in the gunner seat and change the direction you're aiming slightly, and try again. Once inside the rock, you can only be killed with explosives. You can shoot people on the other side, but they cannot shoot you (except with a tank).

[In Pelican cockpits]
To get into the cockpit of a Pelican, back a Warthog against the nose. Get in the gunner seat, then exit it. Angle the gun so that when you get out you land inside the Pelican. This is the same method as jumping into rocks.

[Jumping high with a ghost]
This is most effective for getting on top of Sidewinder and Blood Gulch, but I'm putting it here anyway. Take a ghost and head to a wall that's slightly slanted (it doesn't have to be extremely slanted, but can't make a 90 degree angle). Make sure the wall is to you're right, and start strafing towards it. Be far enough a way so you can get a bit of speed, then, when you're five to seven feet from the wall, exit the ghost. As soon as you can, jump. You should have been going fast enough so that when you jumped out, you landed, more or less, on the wall, then, when you jumped, the speed, the ghost bumping you, and you're jumping sent you fairly high up or over the wall. If you get out too late, you won't go very high. If you get out too early, you'll get run over by the ghost.

[Freezing enemies]
This can be done in many places, but I've only done it intentionally in one location. Basically, what happens is you cross a load point, then go backwards. Some of the computer controlled characters will now be frozen. You can do whatever you want to them, and nothing will happen. Explosives might blow their guns away, but it won't effect them...until you move a certain distance away from them. Then all the damage and explosions take place at once (an actual explosion won't occur, but the effects certainly will).

Here's a good place to do it:
In AotCR, as soon as you get outside to the marines, leave them behind and rush to the chapter "Rolling Thunder". Now, turn around and go back. All the marines that were alive, and most of the ghosts (with their elite drivers) will be frozen.

[Falling through the ground]
Sometimes, when two objects try to occupy the same space at the same time, one (almost always the player) will fall through the ground to their death. There are several ways to do this; here are two:

1. Find a manned shade (one with an enemy in it), and keep walking into it. Keep holding forward, sometimes changing your direction slightly, and eventually you'll fall under the shade and die.

2. In the beginning of the PoA, jump back in the cryo tube before it closes (don't crouch when you do this). Now, walk around inside it a bit. There are several things that can result from this, but I've found that the most common occurrence is falling under the cryo tube, hitting an invisible floor with three bars of health left, then falling to the side and dying.

I've also managed to be killed by having a Warthog flip over and push me through a mountain, and when trying to perform the co-op method of getting through the locked door in the Silent Cartographer.

[Flares]
Flares are useful, usually in multiplayer, for one player to find out where the other is. You need two plasma grenades. Throw one, then, without moving your aim at all, throw the other. They will land on top of each other, and when the first one explodes, the second will be sent straight up into the air and detonate.

[Dirt from nowhere]
Sometimes when programmers assign a certain effect to a color (like brown dirt being flung into the air when hit with a bullet), the effect can be inadvertently assigned to other objects as well. Take any weapon (for best results: plasma grenade, sniper rifle, LAAG, or plasma pistol). Go to any Pelican and shoot the glass of the cockpit with it. Dirt will fly into the air out of nowhere, but will not if the Pelican is hit anywhere else. Also, if you use a flare, look closely at the second grenade's explosion. A pile of dirt will appear in the middle of the sky.

[Invincibility]
If your overshield is charging, you're temporarily invincible. You cannot be killed by any amount of explosions during this time. This is very useful for rocket/grenade jumping, or taking a ride in a warthog during a warthog jump.

[Headless MC, PoA]
Choose the level the Pillar of Autumn (heroic or legendary for best results), and as soon as you gain control of Master Chief, jump back into the cryo tube before it closes. If you made it, you should be able to walk down a bit. Then, looking at the cryo tube at different angles can result in seeing a body of Master Chief, but with no head. This is the body you get from the view in the beginning on the lower difficulties (like when it says to use the right stick to look around, and they bring up your health monitor). In this view, you do not see your own head, so when you see it from third person, you don't have a head.

[Outside the shield charger, PoA]
At the beginning of the game (on easy or normal difficulty), after the crewman works with your vision (inverting the y-axis), you're told to walk over to the energy shield test station. Once there, look at the crewman and walk slowly to the very edge of the yellow box. If you're just barely in, the chargers will start up, and on their first time around will knock you out of the box. Your shields will still charge, though.

[Under Cpt. Keyes, PoA]
I'm not sure how this one works yet, but sometimes, in the cutscene where Cpt. Keyes gives you his pistol, he will be standing on top of you. You'll only be able to see his legs. I'll update this if/when I find out what causes this.

[Three weapons in PoA]
Once you make it to the bridge, skip the cutscene, then watch as Keyes gives you his pistol. Right after that sequence ends and you regain control of MC, run as quickly as you can back the way you came. There is a checkpoint at the entrance to the bridge, but if you get there before the objective (Escape from the PoA...) fades from the screen, you will not get the checkpoint. Continue on, pick up the assault rifle, then go pick up any other gun. Now, head back to the bridge and walk up to Captain Keyes. Leave, again, and when you cross the checkpoint the pistol will load. You now have three guns. You can switch them, swap them, reload them, save the game, anything you want. In single player, you will have the three weapons for the rest of the level no matter what.

[Under the light bridge, Halo]
After you get the Warthog, drive to the cave place. After disposing of all the Covenant, look to the left side of the room (before or after the light bridge, it doesn't matter) and you should see a small ramp, leading to a platform with a glass center. Get a lot of speed with the Warthog and drive off this ramp. Turn to your right as you start going off, so you're turning horizontally toward the wall in front of you. If you did it right, you'll hit that white section and start to slowly slide down. Don't accelerate until you hit the bottom.

[Inside light bridge hole, Halo]
Activate the light bridge in Halo, and go to either of the four arms that come out to create it. Jump onto one of these (it's easiest to jump onto the thicker sections) and walk to the wall that it comes out of. You can now crouch and walk into it. If you go all the way back, though, you won't be able to get back out.

[Bypass the red elites, Halo]
Head to the room with the lightbridge and drive toward the wall near the control panel, past the ramp that leads to the red elites. Park the Warthog against this wall and jump on the gun. Jump, or crouch-jump, onto the sloped part of the wall and you can just walk up and activate the bridge and jump back down without facing the elites.

[Top of Halo (two ways)]
Method 1: Right when you get the Warthog, hop in and turn around. Look at the cliff wall. You should see a very grassy area that transitions into a very rocky area. Get some speed and drive up the grassy area, right next to the rock area, but make sure you're in no way on the rock. Keep holding up, and you should continue moving slowly. Turn when necessary to make sure you don't drift too far either way. Eventually, you'll start picking up speed and will be at the top. Warning: You cannot exit the Warthog once at the top. If you're moving and the big blue beam shoots, you'll freeze. You won't be able to move, shoot, switch weapons, anything except look around.

Method 2: Drive to the group of marines overlooking the cliff edge ("We should search the interior of the structure before we leave"). Go to the grassy wall opposite the cliff edge. Get some speed and begin driving up this wall. You'll go somewhat slowly and you'll have to make adjustments left or right as you go, but getting to the top doesn't take as long as in the previous method, and you can't freeze once you're there.

[Bottom of Halo]
Whew, this one took a while. I've wanted for so long to get to the bottom of Halo's waterfall, but the way to get there definitely isn't what you'd expect:

1. After you get the Warthog, turn around 180 degrees and look at the cliff wall. See how the rocky part fades into the grass part. Get some speed and drive straight to the transition, where the rock fades to the grass, but slightly more towards the grass. You should be able to, very slowly, drive to the top.

2. Once you begin gaining speed again, turn to the right and drive that way. After you go over a small slope, notice how to your left there is a relatively flat area. You should be on the slope that leads up to that area. Don't go there, keep going forward and they'll be a small area that slopes up. It's not very big, but it's big enough for the Warthog to sit on. This slope is down and to the right of the flat area I was talking about before. As soon as you get to the top of the level, hurry to this slope and stop.

3. Watch the blue beam, now. Count how long a pause there is between each time it fires. For seconds before it fires, begin driving up and to the left, on top of and past the rock area that was above you when you first came atop the level. Keep going straight across at full speed and you'll start going down a slope. Past this you should see a small hill. You want to be on the left side of this hill (or close to it) when the beam fires. If you get it, you should start sliding down, frozen.

4. Once you slide far enough down, you should regain control. Drive up again, and to the left. Once you're out of the rock area, drive fully to the left until you can drive down to a lower section of grass. Do this, and look for a flat area with 2-D trees. You want to be somewhere near in between the first two trees you come across. Once there, stop and watch the beam.

5. Two seconds before the beam fires, begin driving up hill. Keep going up and out of the level, to the untextured area. Keep going until you hit some sort of funky wall that you can't see. Once you hit it, turn about 30 degrees to the left and keep going.

6. Head for the bottom right slope of the Halo on the textured side of the map. Keep going there, paying attention to how far away you are from the nav point. If you're ever in the 300s from the nav point, you'll freeze, and some say that if you're in the 470s and the beam fires, you'll freeze, but other than that you don't have to worry about freezing.

7. Hopefully at somewhere around 490 from the nav point, you'll hit a wall. If you do, aim to the right, about one fourth of the way from the right side of the half-cloud in front of the cloud. Aim there, and go as fast as you can. Hopefully, you really won't make any progress, but will end up having your Warthog fall over an invisible edge and onto a slope, and start sliding down. If so, that's it, you'll slide to the bottom of the level. If not, keep going full speed, never letting up on the gas and hopefully you'll get it.

For another description of this trick, and videos of it, go to:
http://yuan.ecom.cmu.edu/utfoo/
There, go to exploration, and at the bottom of the page, "The Bottom of Halo, Redux".

[MC falls to death in cutscene, Halo]
At the last drop pod in the level (the one with a structure overlooking a very large cliff edge), go through normally until you hear Cortana say "That's the last of'em". At this point, run to where Foehammer lands, as close to the cliff edge as you can get. As Echo 419 starts landing, position yourself directly under it. You should be pushed partially through into the bay of the Pelican. Jump so you're fully in. Wait a minute or two, and the cutscene will start automatically. When the Pelican starts taking off, MC will fall out of it. This sometimes doesn't work, and I'm still trying to discover the triggers for it. Also, if you just stand outside the Pelican and let the cutscene start automatically, sometimes you'll be left there as Echo 419 takes off without you.

Note: This is an extended version of a glitch where standing outside the Pelican and having the cutscene start automatically will have the Pelican leave without you; E419 will take off, and you'll just be standing there by the edge of the cliff.

[MC attacked in cutscene, T&R]
After rescuing Cpt. Keyes, head to the shuttle bay. Kill two or three marines (not the captain), so they'll turn on you. Activate the cutscene by releasing the dropship, and when the scene starts, Cpt. Keyes and any other marines will be shooting you.

[Warthog in the main facility, SC]
Deactivate the security system, pick up the RL and take the Warthog back to the Silent Cartographer's main facility. Drive it through, then drive it to the door you just unlocked. Line it up, then drive it backwards, up the ramp, and into the wall. Drive full speed forward and try to ram it through the door. Sometimes, if you're lucky, you'll get it all the way through. If it's partially through, drive it backwards as much as you can and get out. Fire rockets straight into its back until you goes through.

[Bottom of the main facility, SC]
This one is hard. It will take you many tries. First, get an overshield, then drive a Warthog into the main facility. Activate the cutscene of MC kicking a rock off a platform, save and quit, then go back and get the Warthog. Hop in, and drive it off the platform at a moderate speed, and somewhat to the left. Try to land completely in a little blue room. If you make it, congrats, you get a checkpoint. Back the hog up to the right corner, get as much speed as you can, and make a sharp left turn as you go off. You should fall past two levels, then land on the third. You must land on the third, in the Warthog. Make a sharp turn as you go off this edge and pray you land right side up about four stories down. If you do, you'll be inside a small pit. Get any bit of speed and drive to a corner. Keep holding up, and turn onto the small platform above the pit. Align the Warthog, then drive it slowly backwards so that your back wheels are dangling off the edge and you're oh so close to falling. Drive it forward to full speed, and as you near the edge, make a sharp turn in the direction of the wall (or the direction opposite of the pit), and you should land on another level. Make a sharp turn going off this one at a good speed, land right side up, and you should be at the bottom of the shaft, possibly with full overshield and full health.

[Descending the security shaft, SC]
Head to the security building, kill everyone, and deactivate the security system. Exit the building and kill the invisible elites. Go back and get a health pack if you need it, then grab an overshield. Head back to the security building and behind the holopanel, where there is a large shaft. Run off the edge (never jump unless you really think you have to) and aim for the large platform right in front of you, a few stories down. Whenever you fall here, you must crouch before/as you land or you won't survive. Once you're on that platform, look for a small platform against the wall about two stories down (the wall opposite of where you came from). Aim for that, crouch as you land. Go then to the next large platform. Keep doing this, making sure you're shield is completely recharged before heading to the next level. You'll probably lose your overshield on the first drop, and then one or two health bars (sometimes none) for each drop thereafter. You can get pretty far down this way, although it may take a while to be able to get down as far as you can in co-op.

[Marines never stop shooting, SC]
Take a Warthog full of marines to the main facility. Try not to run over any enemies and hurry to the hallway that slopes downward, with the load zone in it. Park the Warthog just outside of it (in the upper section, not the lower), and get out. They should be firing at the covenant above them. Start heading down, and time it so that as they're firing, you cross the load zone. If you do it correctly (cross while they're shooting), they'll never stop firing. They'll keep their guns going fully automatic until you cross the load zone again.

[Don't deactivate the security system, SC (two ways)]
You know that door that locks on you, and you have to deactivate the security system to unlock it? Well, before it closes/locks, you can do one of two things:Jump out of the warthog really quickly and hope you land inside, orRam the Warthog into the opening, and if you were lined up right, you'll get partially through. You can now jump out and be on the other side of the door, where you'll find the gold elite. Don't worry, he hasn't been activated. Kill him if you want, but he won't attack you. When you come back up after finishing the level, get in the Warthog and drive it as far backwards as you can, get out, and you should be on the other side.

[Free grenades, SC]
Get the Warthog into the main facility and past the door. Now, drive at a moderate speed (not too slow, not too fast), out onto the platform. When the cutscene starts, the Warthog will keep moving a few feet and run over MC (notice when he reappears, the pebble falls off the platform without being kicked). When this ends, go back behind the warthog, and you can pick up the dead MC's grenades (at least four frags and two plasmas).

[Automatically kill the gold elite, SC]
Get the Warthog into the main facility and past the locking door. Park it right before the T-junction area place thingy, where the gold elite spawns. When you come back up after activating the silent cartographer, you'll see a bright flash as the elite spawns and is immediately killed by the Warthog on top of him.

[Warthog through the tree barrier, SC]
In the Silent Cartographer, when you're heading to the security building, you'll come across a bottleneck with trees placed in such a way that you cannot get the Warthog past. Explosives will not get it past, nor will driving really fast. To get the Warthog through this barrier, drive it at a moderate to fast speed, and turn it a bit to the right as you start going through. It'll be obvious if you did it right, as you'll get through fairly quickly.

[Top of the Silent Cartographer]
After you've passed the tree barrier mentioned in the previous trick, you'll come across two hunters guarding a strange looking structure. Kill one of them, and pick up an overshield. Now, stand close enough to the hunter so that he charges you. Keep doing this until you've lured him back into the bottleneck. The canyon walls are smaller here. Now, get him to charge you once more, but this time jump as he melees you. You should be thrown into the air and land on top of the level.

[Stay in Pelican, AotCR]
Right as you gain control of MC at the beginning of AotCR, start tapping X. You'll start getting out of the Pelican, but then you'll get right back in. As the Pelican starts back down again, it'll hit the wall a few times, and eventually you'll fall out and die, though.

[Floating plasma grenade, AotCR]
This can happen anywhere with a glass floor, but is most relevant in AotCR due to it having more glass floors than any other level. Go to the first bridge and kill everybody so they don't get in your way. Now, stand next to one of the glass panels and throw a plasma grenade on it so, after it's finished bouncing, it is still on the glass. Once its set itself, shoot the glass out from under it. The grenade will remain floating in the air for a second or two before it explodes.

[Jumping between bridges, AotCR, Two Betrayals]
When on a bridge with another bridge next to it, stand on top of one of the slanted concrete things. Throw a plasma grenade at the bottom of the sloped part of it, wait about two seconds, then run forward and jump toward the bridge. The explosion will throw you forward more, and you should make it across with three or four bars of health left (if you had full health when you jumped). This is pretty useless on Two Betrayals, though, because both the doors are locked.

[No enemies, AotCR (three ways)]
There are three ways to have no enemies on AotCR. For two of these, you must get onto a certain ledge. Go to the lower section of the bridge, then walk to the back (towards the door you came from). Look down and to your right, and you'll see a small rock ledge. Get a running start and jump for it, then crouch as you land. For speed, as you come out onto the bridge, turn to your left and just jump over the side there.

1. The first way to do this is to put a shade on the snow ledge. Throw a plasma grenade next to it and try get it to land (and stay) on the snowy ledge. Now, get to the rocky ledge, and jump just behind the shade. If you did it right, the shade will stop you from falling off the ledge. Now, walk up the ledge and forward, toward the end of the canyon. When you first start round the bend, fall down. Try to stay against the wall to slow you down, then crouch as you land. *Note: I tried, but could never actually get down this way*

2. The second method first involves jumping onto the rock ledge, so do that. Walk to the bottom of the ledge. Now start walking back up again. Look for a spot where the ledge becomes slightly steeper; remember that spot. Walk back down the ledge, and run along the right side. You want to be off the ledge a foot or two past that point. When you're falling, turn yourself toward the wall and hold up. If you hit just the right spot, you'll stay on the ledge without losing any of your shield. Walk along the ledge toward the bend. When you're rounding it, look down to make sure there are some large rocks below you. If so, fall off, staying as close to the wall as you can, and crouch as you land.

3. Get the "early banshee" (two tricks ahead). Fly through the underground cavern, past "Rolling Thunder", etc., until you see two bridges. Landing on the right side of the back bridge and get out. Go through the nearest door, and complete the level.

Note: For tactics one and two, take a ghost and drive it as you can, past the tank barrier and to the back of the last section of fighting before you go inside. There, you'll find a banshee. You have to take this to the right side of the second bridge (the one in the back) and go through there to complete the level.

[Two crashed Pelicans, AotCR]
Perform either or the first two tactics from the previous trick to get down the first bridge. If you do it quick enough, you can enter the seat of the Pelican that drops the marines off. If you do, it will take off and fly to the section of the canyon with the tank and crash next to the other crashed Pelican. There, you can press X to exit it.

[Early banshee, AotCR]
At the beginning of AotCR, after you ride the elevator down and come out outside, pick up the sniper rifle and the rocket launcher. Take the Warthog and drive to where the tank is. Take the tank if you want, but continue on to the next area. You should see a small raised area with a shade on it, a Wraith on an icy lake, two more shades, several ghosts, and a Wraith and shade on top of a tunnel. Do not pass the ice lake. Look up and to the left and you should see a small platform with lights on it. Head over to it, and stand directly under it. Take out your sniper rifle zoom in 10x. Look for a line near the front of the platform. Aim in the middle of the platform, just before this line. Switch your rocket launcher and fire. If done correctly, a banshee will fall off the platform and land next to you.

[Into the Control Room with no cutscene, AotCR]
At the end of AotCR, bring a ghost to the control room door. Line it up so the door is to your right, then strafe toward it. Jumping out at the right time and with the right speed will cause the ghost to push you through the door. If you do it right, you'll be inside the control room with no cutscene. To finish the level, go back up to the door and "Press X to enter Ghost", then open it normally.

[Bottomless tree, AotCR]
Get the "early banshee" and fly (or don't get it, and find a place to climb) up to the place in that same area with a shade and a wraith (it's on top of the tunnel leading to the cavern). Destroy the wraith, kill the grunt, and land. Get out, and look for a tree near the back, somewhat in the middle. The tree is missing its bottom. You can walk right under it.

[Off the land bridge, AotCR]
On AotCR ("If I had a super weapon"), if you can't get either of the banshees, go to the middle of the land bridge. There should be some sort of a support thing; a giant, but thin, concrete slope leading from the pyramid structure into the ground. Jump onto that. Start walking up it until the point where it becomes half as thick. Here, you should fall off and crouch as you land. You should survive and can now continue to the door as usual having skipped a few rooms of enemies.

Or, if you're on the slope, I think you can also walk down and end up in a weapons cache, still skipping part of the level.

[Unresponsive enemies, AotCR]
Play through AotCR normally until you get to the land bridge. Take a banshee and kill the driver of the other one. Head down and destroy the wraith and kill the elite next to the two ghosts. Take a ghost and head to the top of the pyramid, to the door. Position your ghost on top of the white arrow, so the door is to your right. Begin strafing to the right and exit the ghost, so the ghost has enough momentum to push you through the door. Once on the other side, the covenant will not attack you. The grunts will jump up and down and such, but none will move from their positions or react to you, other than dying if you kill them. To get them to attack you, open the door that you were pushed through.

[MC killed in cutscene, AotCR]
At the end of AotCR, bring a banshee to the control room door. Park it on the second area from the door that doesn't look like clear glass, and seems elevated from it. Open the control room door and get in the banshee. Fly it forward at a high just high enough so you're not hitting to floor. Try to time it so you're going full speed (or at least a decent speed), and that you get under the opening door. If done correctly, the cutscene will start and MC will get crushed by the banshee. The cutscene will continue normally, with MC still talking to Cortana, but MC will actually be in the background propped up by his AR.

[MC attacked and killed in cutscene, AotCR]
Lure a banshee or hunter to the control room door at the end of AotCR. If you lured a hunter (much easier to do, they tend not to run you over), make sure he's looking at and right in front of the control room door as the cutscene starts. When it does start, MC will be attacked and killed, and Cortana might be attacked, too. If you lured a hunter close enough, he will melee MC repeatedly during his walk down to the control panel. Right before the camera angle changes, his shield will pop (MC's). Then, after the camera angle changes, MC will get meleed once or twice more, one of them resulting in his being thrown off the platform. He will not talk at all during the cutscene, but Cortana will still respond as though he said something.

[On top of 343 GS]
At the beginning of 343 GS, as soon as you gain control of MC, throw one grenade. You'll stay in the Pelican, which will soon take off and crash on top of the level. Press X to get out, and explore the wonders of 2-D trees and invisible walls marking the edge of levels.

[Floating assault rifles, GS]
Get on top of the level 343 GS and head to the building that you're supposed to enter. Drop down and look quickly inside. You'll get there fast enough to see a group of grunts and jackals running away, being fired at by assault rifles with no marines controlling them.

[Mysterious marine, GS]
Get on top of the level 343 GS, and as you exit the Pelican, head to the left. Keep exploring, and after a while (it may take you several minutes), you'll come across a lone marine. He responds only if attacked, and seems to serve no purpose whatsoever.

[Auto-death, Two Betrayals]
In Two Betrayals, grab the first banshee and fly back into the control room. Look under the platform for the large lights that circle the room. Fly the banshee to either of the two closest to the platform (either the one on the left or right). Contact with the concrete that makes up the section with the light on it will cause your banshee to explode and you to die.

[No enemies, Two Betrayals]
After you kill the sentinels in the beginning, and the small battle taking place when you open the next door, head to the door next to the stationary shields (the one that leads outside). Press X to open the door while facing the panel. Right after the lights stop flashing on the panel, press X again. The door will open, and there will be the usual elites and jackals, but you'll know you've done it right if there aren't any grunts. In this current state, there are no other enemies. Destroy the wraith, take the banshee, whatever, they won't spawn until you press the control panel to the door again. You cannot complete the level with no enemies, though, since the first pulse generator has no pulse, and the door to the second chasm is locked.

[Sniping wraith driver, Two Betrayals]
When you first come outside on Two Betrayals, head up the ramp in front of you. At the top of the tower will be a sniper rifle, take that. Now, head back down. Start descending the pyramid by sliding down the walls on the right side. When you're one level from the last, make sure you're as far to the right as you can get and walk down. To your left should be a slab of concrete (you should be on the last level before the ground). From the right of that, zoom in with your sniper rifle to find the wraith. Now, sidestep to the left. When you've walked past that slab on concrete, quickly zoom in on the wraith and aim for the driver seat. The elite should have spawned. He'll jump onto the wraith, and start getting in. Fire two or three shots at him as he's on top of the vehicle and he should die before he can get in.

[Beginning of AotCR, Two Betrayals]
Go to Two Betrayals and go through it normally until you get the banshee in "Final Run". Remember how AotCR and Two Betrayals are the same maps? Well, the room with the banshees is the area where you first come outside on AotCR. Above you is the first bridge you cross in the level. Fly up to the bridge, and head to the door which has a lot of rock broken away around it (the door you come out of on AotCR). Go to that door, and squeeze your banshee against it backwards. Go forward as far as you can until you hit a wall. Now, back up as quickly as you can and get out. If you do it at the right time, the banshee will push you through the door and you can now explore all the sideways doors and textureless environments of the beginning of AotCR.

[Across the hole in Keyes]
In the beginning of the level Keyes, there is a gap you're supposed to fall through. Instead, throw a grenade next to the hole, on the right side (and on the side you're on). Get a running start, then jump about two seconds after you threw the grenade. You should land on the other side. You can kill everybody over there, but you can't skip the outside area. You must drop back into the hole to complete the level.

[Fast banshees, Keyes]
At the end of the level Keyes, run quickly to the banshees landing. Jump on one if you can, or if you're too late, jump down anyway. Quickly hop in and you can take a few seconds' ride in a really fast banshee that can fly through walls.

[Outside of the PoA, The Maw]
At the beginning of The Maw, go far enough so that Cortana starts talking, then turn around and head back. Walk over to the edge and look down. Stay here until you hit a checkpoint. Now, count how long it is until the first sentinel appears under you. It should be about 12 quick "Mississippi"s. Anyway, you want to revert to saved, and walk off the edge at the right time so that you hit the first sentinel on its right side while your falling. Crouch when hit the bottom, and you should hit a slope. You will keep falling down, so crouch again when you impact with the corner of the ship and the ground.

[Play with "Revert to save" screen, The Maw]
Head to the bridge and kill all the grunts. Walk to the panel where the cutscene is activated, but before it starts, press start and revert to saved. Do not actually revert to saved, just bring up that screen. If you did this at the right time, you can now play through the level with that box on the screen. Loads of fun. </sarcasm>

[Inside the vent core, The Maw]
Head to the engine room, and go to the control panel closest to the barrels that you can jump onto if you went to the wrong side first. Retract the cover and jump down onto the thing that moves backwards. Hop onto the front (the slighty fatter) section, then fire a rocket into the core so it explodes. When the exhaust coupling or whatever starts moving back to the vent core, crouch. When it gets close, jump onto the small ledge right in front of the vent core. You want to land on that, and have the exhaust coupling push you into the core. If it doesn't push you in, you'll lose life every few seconds and quickly die, but if you make it inside the core, you can stay alive.

[Bottom of the Maw jump]
Choose The Maw, on anything other than Legendary for best results (and more time). Go through the level normally until you reach where Foehammer is supposed to pick you up. Continue on until you reach the big jump, where you fall several stories. When going off this ramp. Head to the left side. You want to land on top of the left side of the wall of the little island thing down there. If you made it, get out of the Warthog and walk down the sloped surface to the left, that leads to the wall. There's a small catwalk or something running along the wall. Get on that and look down. Notice a support beam a bit below you, and a large platform farther down. Revert to saved and get to the left side of the island wall again. You want to drive the Warthog straight into the wall (onto the small catwalk) and get out. You'll have wanted to have the Warthog fall and land on the platform below (and above all, have it stay on the platform). Now, look down to the support beam just below you. You want to jump onto that. It's easiest to just walk off when you're right above it. As you land, crouch and start walking to the left so you don't slip off. Look across the beam to see a light in the middle. Walk to the light and look down. On the platform below, there are two parts that rise up from it and form scalene triangles. Your target will be the one on the left. Walk off, and to survive this fall, you need to hit the middle of the small slanted part. If you hit the top of the triangle or the bottom, you'll die. You want to hit the right hand slope and crouch as you hit. You should make it down without losing your shield. Now, walk to the upper left-hand part of the platform. Throw a plasma grenade down the wall. You should see that the wall ends up sloping before it reaches the ground. Get in the Warthog, get some speed, make a sharp turn as you go off, and try to land on the sloped surface, you slide in the Warthog the rest of the way down. Yes, this is a complicated trick and will most probably take you several tries.