Ugh ...
There are few videogame movies that ever turn out well and (in my opinion) it is because the style and substance of writing that makes an enjoyable videogame rarely works for a movie. From what I have seen the best written videogames tend to leave the motivation and personality of the main character up to the personal interpretation of the player; on top of this the cheesy elements that are in every game tend to be minimized in these games in some way.
Movies don't have the luxury of leaving personality and motivation up to the viewer, so the protagonist from Bioshock may end up being a lecherous immoral opportunist where you thought of him as a fairly normal easy going guy who was making the best of a bad situation. At the same time, movies tend to (unfortunately) play up the unnecessary and (often) cheesy elements of a videogame rather than capture what people really enjoyed about playing the game.
