M.A.S.S. Builder

Sekai Project · Vermillion Digital

Available Install to Play Premium tier ActionIndieRole Playing

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.

Available on GeForce NOW

Play type: Install to Play
Membership: Premium required
Last verified: 28 Jul 2026

Available on

Steam · Sekai Project Open store ↗

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