Subterror

At the bottom of the ocean floor lie The Biospheres. These weather-controlled domes once supported vast arrays of lifeforms, but have since been abandoned. Explore arid deserts, dark forests, and frozen tundras. But don't stay too late, as you are not alone out in the great abyss. It's dangerous to go alone. Bring a crew of up to 4 players to better your odds. Or, if you are feeling hardcore, you can venture off by yourself.