id Tech 2
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id Tech 2
Developer(s)
id Software
Release date(s)
21 December 1999 (Source code release)
Platform(s)
License
Todo: Mention 
FTE, a notable fork of the Quake I engine in relation to Valve's engines. See Quake#Source ports for more info.
FTE, a notable fork of the Quake I engine in relation to Valve's engines. See Quake#Source ports for more info.This page documents information about an engine not developed by Valve. This information is documented here because it has technical and/or historical relevance to Valve's engines.
id Tech 2, also known as Quake engine, is an engine created by 
id Software for Quake, and later modified for 
Quake II. It was used as the foundation for 
GoldSrc and all subsequent 
Valve engines.
id Tech 2 consists of the following two "branches":
- The Quake Engine, developed for Quake and used by several other games
- The Quake II Engine, developed for Quake II and used by several other games
Both id Tech 2 engines were later made open-source under the GNU GPL 2.0 (or later) license.