Treyarch

Treyarch is an American video game developer company, founded in 1996 and acquired by Activision in 2001. Treyarch are located in Santa Monica, California.

Treyarch has developed several games in the Call of Duty series, which are listed below. All of the Call of Duty games developed by Treyarch have been set in the WWII timeframe, with the exception of their most recent title, Call of Duty: Black Ops. Unlike Infinity Ward, Treyarch has developed games outside of the Call of Duty franchise, and traditionally makes Nintendo Wii versions of their games.

Some of Treyarch's Call of Duty team comes from an older studio known as Gray Matter Interactive, responsible for games like Kingpin (while under their old name "Xatrix") and Return to Castle Wolfenstein. The team was responsible for developing Call of Duty: United Offensive before merging with Treyarch. Some of the Gray Matter team still resides at Treyarch, although its founder and several executives from the former studio have found employment elsewhere.

Treyarch is sometimes referred to as Call of Duty's "B-Team", since the Call of Duty games that they made in the past weren't as successful as those made by Infinity Ward up until the release of Black Ops. Treyarch's latest game, Call of Duty: Black Ops, was released on November 9th, 2010.

Games developed for the Call of Duty series

 * Call of Duty: United Offensive (As part of Grey Matter Interactive)
 * Call of Duty 2: Big Red One
 * Call of Duty 3
 * Call of Duty: World at War
 * Call of Duty: Modern Warfare: Reflex Edition (a port to the Wii)
 * Call of Duty: Black Ops 

Trivia

 * Compared to Infinity Ward, Treyarch's versions of Call of Duty are usually more gory and mature than IW. Both have swearing and prevalent blood, but in World at War and Black Ops (The two most recent and prevalent COD titles made by Treyarch) gore and mutilation are present as well as the use of flame based weapons such as the Flamethrower underbarrel attachment (Black Ops) and the M2 flamethrower (World at War). Also notable is the Nazi Zombies game mode, exclusive to Treyarch games.
 * Much like Infinity Ward, Treyarch makes refrences to their company name many times throughout their games. An example would be the writing on the side of the school bus on the map 'Nuketown' in Black Ops.