Subterrain

Subterrain is a survival game set in Mars MPO, an underground city on Mars. You play as Dr. Albert West, apparently the city’s lone survivor, and must contend with the catastrophe spreading through the colony while managing your needs, treating injuries, gathering resources and fighting its horrors.

Story and setting

By 2050, humanity has colonized Mars through the efforts of Jeff Murray, who built Mars MPO underground to protect it from high radiation and extreme temperature changes. Free from constraints that often hindered businesses and researchers on Earth, scientists and entrepreneurs flocked to the city.

Dr. West came to MPO at Murray’s invitation to work on a cure for Alzheimer’s disease, hoping to save his wife Jennifer from dementia. A lab accident led to an accusation of murder and his imprisonment. You take control a little over a year into his sentence, a week after the guards mysteriously vanished, as he begins to discover why.

Survive on Mars

You manage hunger, thirst, exhaustion and other bodily needs, as well as oxygen and temperature while exploring. Injuries such as bone fractures and blood loss need attention; you can scavenge or conduct research to obtain medical supplies. The world keeps moving while you act, and the infection spreads over time.

Fight and defend

You fight enemies with melee and ranged weapons, customizing ranged weapons with modular parts. Enemies evolve over time, growing from cocoons into monstrosities. You also defend your generator against invasions.

Craft and research

You collect junk and creature parts, then break them down into components. Use 3D printers to make armor, guns, grenades and upgrades, and the Bio Combiner to craft performance enhancers, survival gear and more. Harvest plants and ores in the biosphere and mine, then refine them into materials. Research items to produce more powerful versions, including a lightsaber or power armor.

Explore the colony

Mars MPO includes randomly generated sub-levels and hand-crafted locations. You can move freely between districts, restore the colony’s habitat by repairing temperature and oxygen generators, and search for clues about the infection. Logs and story sequences tell a non-linear story as you explore.