Doom: The Boardgame Expansion Set promises to dramatically expand and improve the basic game. It includes 36 new figures, including new Invaders (the famous cacodemons from the first Doom game, zombie commandos, winged cherubs, revenants, and maggots) and three new marine types.The expansion also includes a brand new Invader deck that can be used instead of the old one, new map pieces that include airless terrain, rules for competitive deathmatch and capture the flag games, new marine skill cards, and special cards that allow players to tune the difficulty of the game to their liking. New equipment, weapons (the Soul Cube), terrain features, replacement 'Dud' cards that rebalance the original game, and an assortment of tokens for the new scenarios round this expansion out. - BoardGameGeek