Lifeform: Calibos

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.