It is the third game in the TimeSplitters series, after TimeSplitters 2, which was released in 2002 (itself the sequel to TimeSplittersreleased in 2000). The game features a single-player mode consisting of levels where the player assumes the role of Sergeant Cortez, a time-traveling marine from the 25th century, as he attempts to go to the past to save the future. The game also includes a range of multiplayer options as well as a cooperative mode. Online play was included in both the PlayStation 2 and Xbox versions. This is also the first Timesplitters game in the series to receive an "M" rating by ESRB.
In June 2007, a sequel was announced to be in development, titled TimeSplitters 4.