Tomb Raider: Underworld is the eighth installment of the Tomb Raider series, following character Lara Croft. The story continues from the events in Tomb Raider: Legend as a direct sequel, but also addresses unexplained plot elements by association with Tomb Raider: Anniversary; the 2007 remake of the original Tomb Raider (1996). The three games are subsequently merged into the renowned stand-alone Tomb Raider Trilogy of the late 2000s, by the series' second continuation developer Crystal Dynamics. Underworld is the third game in the series to be developed by Crystal Dynamics and is also the first Tomb Raider game to be released on the PlayStation 3.
Underworld is an action-adventure video game with different versions developed by Crystal Dynamics, Buzz Monkey Software, Nixxes Software and Santa Cruz Games, all published by Eidos Interactive. Crystal Dynamics developed the Xbox 360 version and collaborated with Nixxes Software for the PC and PlayStation 3 versions, which were released in November 2008. Santa Cruz Games developed the Nintendo DS version, which was also released in November 2008. The Wii and PlayStation 2 versions were developed by Buzz Monkey Software, although the PS2 version saw a January 2009 release in Europe and March 2009 in North America. The Mac OS X version of the game was released by Feral Interactive on 31 May 2012. Eidos released two new chapters of Tomb Raider: Underworld, Beneath the Ashes and Lara's Shadow, developed by Crystal Dynamics, as exclusive downloadable content for the Xbox 360 on the Xbox Live Marketplace in February and March 2009 respectively.
Underworld received mostly positive reviews for the PS3, Xbox 360, and PC versions. Critics praised the environments, Lara's motion captured movements, story, puzzles, exploration, graphics and the less linear style of gameplay, although some aimed at its "haywire" camera angles and "dodgy" combat system. The PS2 and Wii versions received mostly moderate to negative reviews. Most cited them as having medium/poor graphics, being oversimplified and "dumbed" down, and some bugs, especially the PS2 version. On 27 February 2009, Eidos announced that the game had sold around 2.6 million copies worldwide. On 25 May 2009, it was announced Tomb Raider: Underworld would be re-released as part of the Xbox Classics and Platinum Range lines for Xbox 360 and PlayStation 3, respectively. In the end of 2011, Tomb Raider: Underworld was offered for free to PlayStation Plus members.