The good: unique concept, good sounds, common infected had clothes that seemed to fit the theme. The bad: the first 3 maps are a maze of tiny hallways, tiny rooms, really long, narrow hallways cluttered with boxes and rooms that look the same. You constantly ask, "have I already been in this version of this room?". Open 100 doors and you will see 100 of the same tiny room or closet. Because of the tiny dimensions, hunters are worthless because they don't have room to jump. Jockeys are worthless because they don't have room to take you away from your team. Chargers are devastating because they either charge your whole team down the narrow hall in map 1-3, or charge you off the death ledge that is the entire 4th map. Tanks are devastating in maps 1-3 because you have no room to kite. It was refreshing to go from unplayable claustrophobia to the open deck of the ship, but that last level also lacked playability. Set up 2 players at the top of the stairs, the other 2 can leave the room and have a sandwich, and you will not be touched by commons for the whole finale because you can mow them all down with ease. When the boat "arrives", every character says "get on the boat" and "ferry is here", to which you respond "what boat?". Circumnavigate the ship and fight unlimited hordes and tanks until you find the unassuming life boat on the side. So I appreciate the concept. But it doesn't work for me as a playable campaign because of the dimensions. It takes all the L4D out of L4D.