M.A.S.S. Builder
Developed by Vermillion Digital · Published by Sekai Project
At a glance
Overview
An action, indie, rpg game by Vermillion Digital, published by Sekai Project — single-player, multi-player, co-op, online co-op.
Steam’s own one-line description: “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/publisher text via the Steam store page.
Reception & community
Review sentiment, ownership and peak-concurrent estimates via SteamSpy; tags are player-voted on Steam. Estimates change over time.
Features & modes
Derived from the gameplay modes and feature categories Steam lists for M.A.S.S. Builder.
| Feature | Supported |
|---|---|
| Single-player | Yes |
| Multiplayer | Yes |
| Co-op | Yes |
| Online co-op | Yes |
| PvP | No |
| Cross-platform multiplayer | No |
| Full controller support | Yes |
| Partial controller support | No |
| Steam Cloud saves | Yes |
| Steam Achievements | No |
System requirements (PC)
As published on the Steam store page. Requirements can change between updates.
Minimum
- Requires a 64-bit processor and operating system
- OS *: Windows 7, Windows 8.1, Windows 10 (64-bit versions only)
- Processor: Intel Core i5 or better / AMD Phenom II X3 or better
- Memory: 8 GB RAM
- Graphics: NVIDIA GeForce GTX 1050 or better / AMD Radeon RX 560 or better
- Storage: 3 GB available space
- Sound Card: DirectSound Compatible
Recommended
- Requires a 64-bit processor and operating system
Supported languages (5)
M.A.S.S. Builder FAQ
Answered from the official Steam listing as of June 2026. Where something hasn't been announced, we say so rather than guess.
What kind of game is M.A.S.S. Builder?
Steam classifies M.A.S.S. Builder as a Action, Indie, RPG, Strategy game, developed by Vermillion Digital. 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.
How much does M.A.S.S. Builder cost?
As of June 2026, Steam lists M.A.S.S. Builder at $17.49. Prices and regional pricing change — check the Steam page for the current figure.
Is M.A.S.S. Builder single-player or multiplayer?
Steam lists these modes for M.A.S.S. Builder: Single-player, Multi-player, Co-op, Online Co-op. It supports both solo and multiplayer.
Is M.A.S.S. Builder on PlayStation, Xbox, or Switch?
Our data comes from the Steam (PC) store, which lists M.A.S.S. Builder for Windows. Console availability isn’t in our Steam-sourced data — check the official site or the console store.
Is M.A.S.S. Builder out yet?
Yes — Steam lists a release date of Sep 14, 2025.
What platforms is M.A.S.S. Builder on?
M.A.S.S. Builder is listed for Windows on the Steam (PC) store. Console availability isn't covered by Steam's PC store data — check the official channels.
Is M.A.S.S. Builder single-player or multiplayer?
Steam lists these modes: Single-player, Multi-player, Co-op, Online Co-op.
How much does M.A.S.S. Builder cost?
Steam lists it at $17.49.
Who made M.A.S.S. Builder?
M.A.S.S. Builder is developed by Vermillion Digital and published by Sekai Project.
Where to get M.A.S.S. Builder
We don't sell games or track prices — this links to the official Steam store page.
View on Steam →Listing details from Valve's public Steam store data · official site. Not affiliated with Valve/Steam, Sekai Project.