there is a game coming out called Primal Carnage that looks interesting. its just a FPS and it plays like Left 4 Dead, i'm not sure if it has a story mode (campaign) but it looks like a fun game. you can either play as the human hunters or the dinosaurs. The T-rex acts as the Tank from L4D, while raptors and other dino's act as the other special infected from L4D. as a fan of left 4 dead, i think this looks fun. its no Jurassic Park, but people were complaining JP wasn't a shooter (which i'm glad it wasn't) but if you wanted to shoot dinosaurs, here is the game for you.
forgot to add the link