Fun gameplay once your skills advance, co-op is fun but backing out to join and leave a big drawback.

Even though the bosses are easily defeated and the story is fairly weak this game is great fun. Once you have advanced your abilities it is a real treat to jump roof top to roof top and pick up and throw anything you can get your hands on. Wreaking havoc with a friend in co-op is terrific but ending your game-play to begin or end a session is a tremendous draw back, if Gears can have seamless join and leave why can't crackdown? This game could have had 1000 different achievements with the open ended game-play and huge city. The difficulty could have meant something too, as an achievement for completing missions as well as to expand game-play. The city is empty once you defeat the last boss so don't do it till you've done all the achievement you want.