Other Engines

Id_tech, Source

id tech 1 ("Doom Engine")

  • GPL-2.0

  • Doom.

  • Doom II.

  • Doom 64.

id tech 2 ("Quake 1 / Quake 2 Engine")

  • GPL-2.0

  • Quake.

  • Quake II.

id tech 3 ("Quake 3 Arena Engine")

  • GPL-2.0

  • Quake 3 Arena.

  • Call of Duty.

id tech 4 ("Doom 3 Engine")

  • GPL-3.0

  • Doom 3.

  • Quake 4.

  • Wolfenstein.

  • Prey (2006)

id tech 5

  • Proprietary

  • Wolfenstein: The New Order.

  • Wolfenstein: The Old Blood.

  • The Evil Within.

id tech 6

  • Proprietary

  • Doom (2016)

  • Wolfenstein 2: The New Colossus.

  • Wolfenstein: Youngblood.

id tech 7

  • Proprietary

  • Doom Eternal

GoldSrc

  • Proprietary

  • Half-Life.

  • Team Fortress Classic.

  • Counter-Strike.

  • Counter-Strike Online.

Source

  • Source is free, and it will only cost money if used for commercial products.

  • Half-Life 2.

  • Half-Life: Source.

  • CSGO.

  • Team Fortress 2.

  • Black Mesa.

  • Left 4 Dead.

  • Portal.

  • Portal 2.

  • Garry's Mod.

  • Counter-Strike: Source.

  • Vampire: The Masquerade.

  • The Stanley Parable.

  • Insurgency.

  • Based on the Source Engine:

    • Apex Legends.

    • Titanfall.

    • Titanfall 2.

Source 2

  • Source 2 will be released to the public for free, and it will only cost money if used for commercial products.

  • Dota 2.

  • Half-Life: Alyx.

  • Aperture Desk Job.

  • Counter-Strike 2.