Credit to www.imdb.com:

Run (2008) (pre-production) .... Tucker

Black Water Transit (2007) (filming) .... Earl Pike

"Comanche Moon" (2007) (mini) TV Series (post-production) .... Woodrow F. Call

Pathfinder (2007) .... Ghost
... aka Pathfinder: The Legend of the Ghost Warrior (USA: promotional title)

Out of the Blue (2006) .... Nick Harvey

Doom (2005) .... John Grimm
... aka Doom - Der Film (Germany)

The Bourne Supremacy (2004) .... Kirill
... aka Bourne Verschwörung, Die (Germany)

The Chronicles of Riddick (2004) .... Vaako
... aka The Chronicles of Riddick: The Director's Cut (USA: director's cut)

The Lord of the Rings: The Return of the King (2003) .... Eomer
... aka Herr der Ringe: Die Rückkehr des Königs, Der (Germany)
... aka The Return of the King (USA: short title)

The Lord of the Rings: The Two Towers (2002) .... Eomer
... aka Herr der Ringe: Die zwei Türme, Der (Germany)
... aka The Two Towers (USA: short title)

Ghost Ship (2002) .... Munder

"Xena: Warrior Princess" .... Caesar / ... (12 episodes, 1996-2001)
... aka Xena (Australia)
    - When Fates Collide (2001) TV Episode .... Caesar
    - Lifeblood (2000) TV Episode .... Kor
    - The Ides of March (1999) TV Episode .... Julius Caesar
    - Endgame (1999) TV Episode .... Julius Caesar
    - A Good Day (1998) TV Episode .... Caesar
      (7 more)

The Price of Milk (2000) .... Rob

The Irrefutable Truth About Demons (2000) .... Harry Ballard
... aka Truth About Demons (USA)

The Privateers (2000) (TV) .... Capt. Aran Dravyk

"Hercules: The Legendary Journeys" .... Cupid / ... (2 episodes, 1996-1998)
    - Render Unto Caesar (1998) TV Episode .... Julius Caesar
    - The Green-Eyed Monster (1996) TV Episode .... Cupid

Via Satellite (1998) .... Paul

Heaven (1998) .... Sweeper

Amazon High (1997) (TV) .... Kor

"Riding High" (1995) TV Series .... James Westwood (unknown episodes)

"Shortland Street" (1992) TV Series .... Paramedic Jamie Forrest (unknown episodes, 1993-1994)

"Homeward Bound" (1992) TV Series .... Tim Johnstone

Chunuk Bair (1992) .... Wellington soldier

"Shark in the Park" (1 episode, 1990)
    - Suffer Little Children (1990) TV Episode

Self:

Reclaiming the Blade (2007) (post-production) .... Himself

Pathfinder: The Shoot (2007) (V) .... Himself

Pathfinder: The Build (2007) (V) .... Himself

Basic Training (2006) (V) .... Himself

Du kommst nicht vorbei - Fans im Bann des Ringes (2005) (V) .... Himself

Archive Footage:

First Person Shooter Sequence (2006) (V) (uncredited) .... John Grimm

The Lord of the Rings: The Third Age (2004) (VG) (voice) .... Eomer

"Xena: Warrior Princess"
    - Forget Me Not (1998) TV Episode .... Caesar
    - The Debt: Part 1 (1997) TV Episode (uncredited) .... Caesar