M.A.S.S. Builder
Developer Vermillion DigitalPublisher Sekai Project
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.
Previous #1,323 · Updated Oct 29, 2026.
Updated Oct 29, 2026.
Metadata synced: Oct 20, 2026 · Not queued
Prices & bundle history
Cached US/USD prices; checkout prices may differ. Bundle history covers recorded observations and may be incomplete.
Bundle history & historical prices
Bundle history has not been recorded yet.
Rank History
Recent appearances for this app across complete public snapshots.
| Captured | Top Sellers | Wishlist Rank |
|---|---|---|
| Oct 29, 2026 | #2,703 | - |
| Oct 28, 2026 | #1,323 | - |
| Oct 27, 2026 | #1,642 | - |
| Oct 26, 2026 | #5,574 | - |
| Oct 23, 2026 | #4,560 | - |
| Oct 21, 2026 | #5,391 | - |
| Oct 19, 2026 | #6,589 | - |
| Oct 11, 2026 | #6,660 | - |
Data Coverage
What SteamFueled currently has for this app.
Store Details
Public Steam metadata captured from appdetails. Contact-specific fields stay backend-only.
Snapshot Details
Source context for the latest complete public rank snapshots.
Tags
Public Steam tags split by source. Store tags and genres are used more heavily for benchmark similarity than feature categories.