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.

Tags: Solo · Co-op, Early Access, Action RPG, Mechs.

Steam reviews: Very Positive (85% of 3,731).

Price: $24.99.

Released 2025-09-15.

Last updated 2026-05-02.

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