The next cheapest I can see for this is £24.63 at Amazon.
In Terminator Salvation the videogame, based on the upcoming Terminator Salvation film from Warner Bros. Pictures and Sony Pictures, players assume the role of John Connor, a soldier in the resistance, battling for survival against the far superior forces of Skynet.
Terminator Salvation the videogame is an intense action-packed third-person shooter featuring concentrated armed combat against all of the Skynet enemies from the film and new killer machines specifically designed for the game. Taking place two years before the events of the upcoming film set in a post apocalyptic, decimated Los Angeles, players will be lead through a visceral, story and character driven gaming experience.
Featuring intense third-person action, Terminator Salvation the videogame will take combat to the next level with iconic enemies, cinematic fight sequences and advanced weaponry, drawn directly from the film, as well as an innovative, multi-layered cover mechanic.