Munchkin Marvel 3: Cosmic Chaos, a cosmic-themed expansion for Munchkin Marvel, allows players to team up with Star-Lord and The Guardians of the Galaxy and take down some of the heaviest hitters in the Marvel Universe, including The Beyonder and Thanos. New Portals transport players to far-flung Dungeon locales like Xandar and Knowhere.

This expansion contains 90 new Door and Treasure cards as well as twelve new Dungeon cards.