Red Faction: Armageddon

Armageddon - the fourth part of the game Red Faction. The action takes place on Mars. Mars is colonised and inhabited thoroughly, but the device for creating an artificial atmosphere is captured by a group of unbalanced scoundrels. Colonists have to move under the surface, where for some reason there is air. This is a setting. We meet the hero pursuing his own tasks - he is looking for treasure in a dungeon under someone else's order. But instead of gold and gems, he discovers a device of an incomprehensible purpose.