IW engine

"There's nothing left in the engine from Quake any more. We've continued to re-write every section. We do a lot of re-writing the tools, re-writing lighting calculations. It doesn't sound very interesting. It's very iterative."

- Mark Rubin

The IW engine is a game engine developed by Infinity Ward and Sledgehammer Games for MW3 and is used in the Call of Duty series. The engine is based on id Tech 3, which was used in Call of Duty. The IW engine has been modified with graphical and technical additions since Call of Duty 4: Modern Warfare.

The engine was first used with Call of Duty 2 in 2005 under a proprietary license. The engine did not have an official name until IGN was told at E3 2009 by the studio that Call of Duty: Modern Warfare 2 would run on the "IW 4.0 engine".

A new version of the engine was once again used in Call of Duty 4: Modern Warfare. Modified versions of the engine were used by Treyarch in their Call of Duty games (after Call of Duty 4) and Quantum of Solace.

The latest version of the IW engine is the MW3 engine, which is a modified version of the IW 4.0 engine. The engine of the future title Call of Duty: Modern Warfare 3 is named MW3 Engine because the teams behind the game are now Infinity Ward and Sledgehammer Games (unofficially it is IW 5.0). It is speculated that the next version of the engine will not feature destructible environment. Despite it being available at the time, Treyarch continued to use the older version of the IW engine in Call of Duty: Black Ops due to their familiarity with IW 3.0.

Games

 * Call of Duty 2 (2005) IW 2.0
 * Call of Duty 4: Modern Warfare (2007) IW 3.0
 * Call of Duty: World at War (2008) IW 3.0
 * Quantum of Solace (2008) IW 3.0
 * Call of Duty: Modern Warfare 2 (2009) IW 4.0
 * Call of Duty: Black Ops (2010) IW 3.0 updated version
 * Call of Duty: Modern Warfare 3 (2011) MW3 engine