 
<translate> Ajụjụ: IW engine bụ engine egwuregwu nke Infinity Ward, Treyarch, na Sledgehammer Games mepụtara maka usoro Call of Duty. Igwe ahụ sitere na id Tech 3 dị ka isi ya, ebe ọ bụ na engine n'onwe ya bụ ihe onwunwe na ntinye nke GtkRadiant site na id Software. Infinity Ward, Treyarch, Raven Software na Sledgehammer Games ejirila ya.  Ajụjụ: kedu engine nke oku ọrụ na-agba ọsọ? Ka anyị buru ụzọ mee ka uche anyị dịrị n'ihe anyị na-eme: <eng> Q: Context: The IW engine is a game engine developed by Infinity Ward, Treyarch, and Sledgehammer Games for the Call of Duty series. The engine was originally based on id Tech 3 as its core, since the engine itself is proprietary with inclusion of GtkRadiant by id Software. It has been used by Infinity Ward, Treyarch, Raven Software and Sledgehammer Games.

Question: what engine does call of duty run on? Let's give stream of consciousness first: 