all the lessons with a small description put on a lost...

Lesson 1: NPC Spawning and NPC routing     :      basic SP map making
Lesson 2: Spawning NPC's after another       :      how to make a map like 'Ladder'
Lesson 3:                                                 :      yet to come
Lesson 4: (De)activated Func's                    :     how to make a door open or close after you go through it
Lesson 5: Adding custom textures and music:     how to customize the textures and music to what you like