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Terminal Mass

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About Terminal Mass

Terminal Mass combines first-person shooter action with survival-thriller elements in a dystopian analogue-horror setting. You complete missions in the Domain, an isolated and treacherous environment, to reach deeper sectors and track down three mechanical horrors whose organs can undo the Domain.

Missions and combat

Missions advance your progress through the game. You destroy structures to shift the Domain, hunt monsters to reduce their population and recover Blueprints to unlock weapons.

Weapons and relics

After a successful run, you return to the HUB. The game has more than 16 weapons, ranging from pistols and rifles to double sawed-off shotguns. You can also purchase Relics during a run; they provide temporary improvements that last until the run ends.

Sectors and horrors

The Domain has three distinct sectors. Defeating each sector’s mechanical horror unlocks the next, and extracting its organs helps undo the Domain:

  • The Guts
  • The Pipeworks
  • The Belly of the Beast

Frequently asked questions

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Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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