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David Mertz

Game Credits


DOOM (2016)   (Design Director)
Age of Booty: Tactics (2014)   (Design Director)
Halo: The Master Chief Collection (2014)   (Lead Designer)
Wolfenstein (2009)   (Lead Designer)
Call of Duty 3 (2006)   (Design - Level Building)
Halo: Combat Evolved (2003)   (Multiplayer Game Design)
007: Nightfire (2002)   (Lead Level Design)
Half-Life (2001)   (Additional Level Design)
Half-Life: Blue Shift (2001)   (Level Designers)
Half-Life: Opposing Force (1999)   (Level Design)


Halo 2 (2007)   (Map Editor & New Maps (Pi Studios))


Half-Life: Blue Shift (2001)   (Writing)
Half-Life: Opposing Force (1999)   (Writing)


Halo: Combat Evolved (2003)   (Art)


Mercenaries 2: World in Flames (2008)   (Very special thanks to)


Call of Duty: Modern Warfare - Remastered (2017)   (Certain Affinity)
Call of Duty: Black Ops (2010)   (Pi Studios)
AC/DC Live: Rock Band - Track Pack (2008)   (PI Studios is)
Rock Band (2008)   (Pi Studios)
Halo: Combat Evolved (2003)   (Gearbox is)
Tony Hawk's Pro Skater 3 (2002)   (Gearbox Software is)


Call of Duty: United Offensive (2004)   (Pi Studios)

Developer Biography

Before joining Gearbox Software, David was a graduate student at Virginia Tech working towards a Master’s Degree in Biomedical engineering. While David has been editing levels since the days of Doom, his path to professional game development started with levels created for Quake and Quake II and popular game variants such as Rocket Arena and Rocket Arena 2.

For Gearbox, David was responsible for the building the Boot Camp of Half-Life: Opposing Force and co-designing Half-Life: Blue Shift. He was involved with some of the biggest franchises in PC gaming, including Half-Life, James Bond, and Halo (PC). He is currently a lead designer at Pi Studios.

Last updated: Apr 04, 2006