Id Tech 3

id Tech 3

Quake III, the engine's parent game
Developer(s)	id Software
Stable release	1.32b / August 19, 2005; 19 years ago (2005-08-19)
Repository	github.com/id-Software/Quake-III-Arena
Written in	C (rewritten 14% in C++)
Platform	Windows, Mac OS, OS X, Linux, Dreamcast, GameCube, Nintendo Switch, PlayStation 2, PlayStation 3, PlayStation 4, Xbox, Xbox 360, iOS, Android
Predecessor	Quake II engine
Successor	id Tech 4, IW engine
License	GNU GPL-2.0-or-later
Website	www.idsoftware.com/business/idtech3/

id Tech 3, popularly known as the Quake III Arena engine, is a game engine developed by id Software for its Quake III Arena. It has been adopted by numerous games. It competed with the Unreal Engine; both engines were widely licensed.

id Tech 3 is based on id Tech 2, with a large amount of the code rewritten. Successor id Tech 4 was derived from id Tech 3, as was Infinity Ward's IW engine used in Call of Duty 2 onward.

At QuakeCon 2005, John Carmack announced that the id Tech 3 source code would be released under the GNU General Public License v2.0 or later, and it was released on August 19, 2005. It was originally distributed via FTP, and moved to GitHub.