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M.a.s.s. Builder
MechsAction RPGCharacter CustomizationRobotsGun Customization85% positive on Steam
Vermillion DigitalReleased 15 Sept 2025
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All offers (5)
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DeliveryEdition
Standard Edition 5 offers · EU & Global
Lowest priceM.A.S.S. Builder PC Steam CD Key (valid until May 2027)Activation keySteamGlobal€3.17Payment fee added at checkoutView deal- M.A.S.S. Builder PC Steam CD KeyActivation keySteamGlobal€3.19Payment fee added at checkoutView deal
M.A.S.S. Builder (PC) - Steam Key - GLOBALActivation keySteamGlobal€3.91Service fee added at checkoutView deal- M.A.S.S. Builder (PC) - Steam Gift - GLOBALSteam giftSteamGlobal€27.56Service fee added at checkoutView deal
- M.A.S.S. Builder (PC) - Steam Gift - EUROPESteam giftSteamEurope€27.56Service fee added at checkoutView deal
Official store Steam · price for Germany
- SteamSteam store pageDirect purchaseSteamGermany€24.50Official store, no marketplace feeView on Steam
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Inside the game
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Price comparison
Buy M.a.s.s. Builder key: current price comparison
The cheapest M.a.s.s. Builder key that activates in the EU currently costs €3.17 at Kinguin. Keyfinder compares 5 offers from 2 shops for this price. That is 87% less than the Steam price of €24.50. Prices are refreshed hourly; region, edition and any checkout fees are shown on each offer.
The details
About M.a.s.s. Builder
Commander, customize and build your Mechanical Assault Skeleton Suit (M.A.S.S.) and lead the fight against an alien invasion bent on exterminating the human race. The fate of humanity is in your hands.
- Developer
- Vermillion Digital
- Publisher
- Sekai Project
- Release date
- 15 Sept 2025
- Steam
- View on Steam