2084: It has been five years now that the clans struggle to survive in their underground shelters. Lately, strange robots have been spotted near the river. The brave Conrad Bordage started an investigation to discover their provenance. What a surprise! They are controlled by a group of scientists living in a submarine base, and no one knew this all the time!
The Outlive: Underwater expansion introduces a new location: the Submarine Base. By going there, you can perform new actions, such as building a robot, raising the radioactivity in your opponents' shelters, or recruiting scientists. It also includes a new leader, new events and a new room for your shelter. Forget everything you know about Outlive, and rethink your strategies if you want to guide your clan to the victory!
This expansion also includes a solo mode to play Outlive alone — in case all your friends succumbed to the radioactivity!
—description from the publisher