M.A.S.S. Builder - Player count and game stats

M.A.S.S. Builder is tagged as Action, Indie, RPG. It is published by Vermillion Digital (developer) and Sekai Project (publisher) and released on 14 Sep, 2025. This page tracks live Steam player counts, historical peaks, and regional pricing. Steam player count is currently 13 players live and the all-time peak was 178 concurrent players on 15 September 2025. Current activity is below its all-time peak.

Developer: Vermillion Digital

Publisher: Sekai Project

Platforms:

Release Date: 14 Sep, 2025

Official site On Steam Details

Est. sales: 8,900 High confidence

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.

More M.A.S.S. Builder Details

“A future in where humans lived a prosperous century and technology advancing beyond space and time,” that was what humanity should have been if not for the sudden appearance of unknown beasts of the void. A large portion of humanity were gone in the moment. War for the survival of humanity broke off all over the world, changing landscapes and settlements into warzones. Humanity were forced to relocate into shelters and reinvent their technologies into weapons of war, the M.A.S.S. technology.

M.A.S.S. Builder is an Action RPG with players piloting a M.A.S.S. (Mechanical Assault Skeleton Suit) as a commander of a private military company, setting out to help combat the threat of Quarks. You will build, customize, and fight to save the world, or at least, have fun creating and customizing your perfect mechanical suits.

The game features an in-depth customization system that has a clear distinction between equipment that gives status and equipment of pure aesthetics. You will be able to customize everything to suit your playstyle while looking good in this fast-paced mechanical combat.

Key Features

Customize your own M.A.S.S. without the worry of using cool looking armors with low stats, all parts don't have stats!
Fast paced movement through the battlefield with boosters for you to move around and attack through your enemies.
Fight against hordes of beastly aliens called Quarks, and giant ones that will aggressively hunt you down.
Pick how your weapon looks and shoots with hundreds of parts available to mix and match.
A world compelling and rich with information for you to immerse yourself in.

Controller Support: full
Genres: Action, Indie, RPG, Strategy
Categories: Single-player, Multi-player, Co-op, Online Co-op, Full controller support, Steam Cloud, Family Sharing
Supported Languages: English, Japanese, Simplified Chinese, Thai, Traditional Chinese
Last Checked: 2026-08-05T06:34:55.015Z

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M.A.S.S. Builder - Player count and game stats

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