Game overview
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.
- Last tracked players
- 14
- All-time peak
- 24
- 24-hour change
- Unavailable
- Steam reviews
- 87.5% positive 3,869 reviews · via SteamSpy
Delayed observation · last tracked . Values marked unavailable are not estimated.
About this game Read the full description
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.
Media gallery 22 screenshots · 0 videos
Screenshots
Player activity
Concurrent players over the last 48 hours.
Price history
Last 30 days ? prices in the selected region?s currency.
System requirements Windows
Windows
Minimum
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
Recommended:- Requires a 64-bit processor and operating system
Game details Languages, features & support
- Publisher
- Sekai Project
- Brazilian rating
- 12
- Steam Germany rating
- 16
- Controller support
- full
- Features
- Single-player, Multi-player, Co-op, Online Co-op, Full controller support, Steam Cloud, Family Sharing
- Languages
- English, Japanese, Simplified Chinese, Thai, Traditional Chinese
- Website
- Official website ↗
- Support
- Support site ↗
Compatibility & accessibility Steam Deck, controllers & access features
Can I Play This?
Steam declarations and Valve's Steam Deck compatibility result. Missing data is shown as unknown, never unsupported.
Structured language support (5)
| Language | Interface | Full audio | Subtitles |
|---|---|---|---|
| English | Yes | No | Yes |
| Japanese | Yes | No | Yes |
| Simplified Chinese | Yes | No | No |
| Thai | Yes | No | No |
| Traditional Chinese | Yes | No | No |
More analysis Activity patterns, updates & developer tools
Game Insights
Buy Verdict
Decent deal at 30% off, but might drop further. Watch for better opportunities.
Value Score
Price-to-player ratio ranks in the 81th percentile. Priced as Market at $17.49.
Genre Benchmarks
Early Access Active
Activity Heatmap
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