What are some good PS3 games?

I am going to buy a $30-$40 video game because I'm bored. Any good games. I am thinking of buying resident evil 5. What other games should I buy? I like adventure, long games,action games,creative games, war games and science fiction games. Any good games you'll know? So far I have little big planet 1, call of duty 6 and 7. I have assassin's creed 2,bayoneta, god of war 3 and the sly collection. Any other ideas for games? Thank you very much.