This may be the best expansion I have ever played simply because it adds to s to the base game while retaining everything good about the base game. -It adds more mechanics. The barricades and sewers add a fresh new feel to a game that comes off the shelf constantly. -It adds new scenarios, a huge plus on a scenario driven game. -It adds to the theme so seamlessly that it could have come with the base set. And, it's huge fun! Simply brilliant - great job Flying Frog!