Very solid, love how you can just go in different rooms, pick up a weapon, and just mow down enemies. The only thing I didn't like is that the BOBs just decided to go on without me and kill the Pfhor and whatnot. I ended up killing them before they got out the door along with their comrades just so I could play the whole thing because they left almost nothing for me. Also, make the enemies respawn, I like continuous gameplay. That is the reason I like Envy's map Citadel: It's a large map with retarded BOBs and big amounts of enemies.