 Previously known as the ""Quake III Arena" engine", it was used to power id Software's "Quake III Arena" in 1999.The "Quake III Arena" engine was updated to patch 1.26 and later versions are called "Quake III Team Arena engine" with a new MD4 skeletal model format and huge outdoor areas.It was updated again with the 2001 release of "Return To Castle Wolfenstein" which included a single-player scripting system, and was eventually used to power the first "Call of Duty" title in 2003, ultimately spawning the IW engine.