Some of these multiplayer trophies for Section 8: Prejudice are annoying. They give you the option to play ranked matches with bots, but they disable ranked stats tracking unless you have two other human players in the match with you (makes sense, though). The trophies for Swarm mode (basically a gauntlet of enemies while you defend a Control Point) are going to be the toughest ones, since you need to finish one match on Insane and do all four regular maps on Hard, as well as a map on Medium or higher without dying.
Overall, though, the game is a lot of fun and is a bit different than normal FPSes, IMO.