So, I bought this game yesterday afternoon, and completed it, well... this morning. Probably 5hrs of gaming. Not a huge amount of game time.
The game is based around the first movie, the 'Bourne Identity', with flashbacks to what Bourne was doing before he lost his memory that weren't in the film. The characters aren't based on their film counterparts, with completely new faces being used throughout, which I thought very strange. (Maybe Damon didn't want anything to do with it, can't blame him really!)
The game is passable. Short, sometimes repetitive with a below average ending. The fighting is fun, but again repetitive. One major issue I had with the game was the driving sequence (only happens once, and is available in the demo). In short, it's pants. It's like they were almost finished making it and thought "Ooh, we'd better add a driving section".
It's a shame really, there are some great concepts in here, but all have been underdeveloped. It had the potential to live up to the movies but just didn't quite do so, on any level. I'm a little disappointed at spending £40 on 5hrs of game, that I would not play again.
I think rent it. Complete it. And forget it.