you read teh comic, right? i'm confused. if they need to raise the bridge in order to get the boat across, and they met the l4d2 survivors before they got on the boat and the bridge was lowered back down, then....bill's sacrifice was for nothing? they have to raise it up again with only 3 people, one injured.
the actual campaign itself is pretty cool, although the 3 tanks at once was not as climatic or cool as i'd hoped, as it had looked in the trailer. it would have been nice to include one more level without bill, maybe...providing cover for the l4d2 survivors?