Game engine developed by Id Software for the hit 1996 first-person shooter game Quake.
This original Quake engine has been licensed for use in other games including Heretic 2. More recent games based on Quake technology normally use the later Quake 2 Engine or the Quake 3 Engine.
Notably, this engine can now be licensed free of charge. Information is available on the Id corporate website idsoftware.com.
