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Steam account
M.A.S.S. Builder
- Platform
- Steam
- Works on
- Windows
- Delivery
- Fulfilled when available
No account is currently available. Your order will be fulfilled when eligible stock becomes available.
Inside the game
10 ScreenshotsAbout this game
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.
System requirements
- Operating system
- 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
- Additional notes
- Requires a 64-bit processor and operating system Sound Card: DirectSound Compatible
- Additional notes
- Recommended:Requires a 64-bit processor and operating system
Other details
- Developer
- Vermillion Digital
- Publisher
- Sekai Project
- Release date
- Sep 14, 2026
- Genres
- Action, Indie, RPG, Strategy
- Works on
- Windows
How it works
Account listed
When a seller lists stock, orders are fulfilled first paid, first served.
Your access
Steam login and Steam Guard recovery details appear on your order page.
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Before you buy a Steam account
Ask about offline mode, access restrictions or device compatibility before ordering.
Contact support- Can I play offline?
- Offline play depends on the game and the seller’s instructions. Some games require an internet connection or a separate launcher. Confirm compatibility before purchasing; shared access alone does not guarantee offline play.
- How do I receive access?
- After payment is confirmed, open your protected order page for the available login details and access instructions. Keep your order link for later.
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