Lifeform: Calibos is a modular big-box expansion that adds many new elements to the main game: The option to add a fifth player - who starts on the Crew team... The occupants of Bay Twelve - six new Crew mining company characters, who have just been woken from their sleep-pods. An extra secondary role: a murderous Rogue Synthetic who helps the alien lifeform. Cooperative mode - so that ALL players are starship Crewmembers against the extraterrestrial threat. And many new cards to expand the existing decks.