Latest Game engine developed by Id Software for their hit 2000 first-person shooter game Quake 3: Arena and other members of the Quake Series.
The Quake 3 engine has been licensed for use in other games including American McGee's Alice,
Return to Castle Wolfenstein,
Star Trek Voyager: Elite Force,
The World is not Enough and
Heavy Metal: FAKK2.
The engine can licensed by developers, however Id is limiting this to a small number of companies, unlike the more general availability of the Quake 2 Engine and the free of charge original Quake Engine. Information is available on the Id corporate website idsoftware.com.