Mutants: Incubator Overload - $28

Incubator Overload gives you access to more mutants, so you can create thousands of amazing new combos! It also includes the Buildings expansion module, which alters the game's rules and provides new challenges for you to face. Finally, Heimdall and Glubber have risen and are threatening to destroy the facility! Rally the troops and pit your best mutants against these Solo Bosses in battle!

—description from the publisher