This is an expansion, not a stand-alone game.

Ares Expedition: Crisis is a brand new game mode that uses the mechanics of the original Terraforming Mars: Ares Expedition in a challenging new way. Play it solo, or band together with up to three friends to work together to save Martian society after a catastrophic asteroid collision has taken out nearly all of your infrastructure. In Crisis Mode, the planet is already terraformed, but ongoing fallout from the impact is dropping temperatures, de-oxygenating the planet, and freezing over oceans,and there’s no time to evacuate the entire global population. You must work fast, completing projects to counteract the ongoing crises and re-terraforming the planet before it becomes unihabitable… with billions of people still on it.

Included inside: 4 corporation cards, 10 dummy phase cards, 1 Co-op game board, 85 Crisis cards, 7 card dividers, 1 Crisis board, 16 Crisis counters, 3 detriment tokens.