I'm always excited for innovative cooperative games, and Fantasy Flight's cooperative LCGs (living card games) are some of my favorites. Both The Lord of the Rings: The Card Game and Arkham Horror: The Card Game have 1–4 players each build decks and wield them against a variety of challenging scenarios. The Lord of the Rings has been churning out expansions for years, with all kinds of interesting and strange quests.
But in the year since its release, Arkham has taken the storytelling aspect of these games to a whole new level. Arkham recently finished The Dunwich Legacy, its first full cycle of expansions, which comprise an 8-chapter campaign with a continuing story involving the aftermath of Lovecraft's The Dunwich Horror. The second campaign, The Path to Carcosa, is also well underway, and it explores the strange mysteries of Robert Chambers' The King In Yellow. Now is a great time to try out Arkham Horror: The Card Game and see what it has to offer. The Core Set contains cards to build player decks for 5 different investigators (two at a time, or four at a time with two copies of the set), as well as cards for a 3-chapter introductory campaign.