Download They Are Billions CD Key for free! They Are Billions cd key is a specific combination of 15 numbers and letters that certifies that the copy of the game is original. Redeem the key on your Steam client to download They Are Billions. Your Valid Steam Keys service.
They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?