Steam specs (min / recommended)
Minimum: Système d'exploitation et processeur 64 bits nécessaires Système d'exploitation *: Windows 7, Windows 8.1, Windows 10 (64-bit versions only) Processeur : Intel Core i5 or better / AMD Phenom II X3 or better Mémoire vive : 8 GB de mémoire Graphiques : NVIDIA GeForce GTX 1050 or better / AMD Radeon RX 560 or better Espace disque : 3 GB d'espace disque disponible Carte son : DirectSound Compatible
Recommended: Système d'exploitation et processeur 64 bits nécessaires
M.A.S.S. Builder
Half of the players who buy it never get past the starter missions — yet the same group also posts deep-dive guides for modding mechs weeks later. The longer the session, the sharper the contrast between breathtaking freedom and jarring instability.
What it's about: 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.
In-game
In players' words
Anonymized excerpts from public Steam reviews — picked among those most voted "helpful" by the community.
What players say, by aspect
Detailed data (table)
| Aspect | Mentions | Positive | Mixed | Negative |
|---|---|---|---|---|
| Gameplay | 79 | 24 | 12 | 43 |
| Content / longevity | 43 | 15 | 3 | 25 |
| Interface / UX | 18 | 1 | 0 | 17 |
| Story / writing | 11 | 3 | 2 | 6 |
| Stability / bugs | 9 | 0 | 0 | 9 |
| Performance | 4 | 0 | 0 | 4 |
| Graphics / art | 4 | 1 | 2 | 1 |
| Audio / music | 4 | 0 | 2 | 2 |
| Value for money | 4 | 2 | 0 | 2 |
| Multiplayer | 1 | 1 | 0 | 0 |
Positive reviews by playtime
🎮 Players who like it have spent 24 h on median; those who dislike it: 9.4 h.
Fixed or still broken? Sentiment over time
% of positive reviews per month (months with ≥ 15 sample reviews).
💶 Price history
Steam price tracked automatically since Sep 13, 2019 · All-time low: €16.79 (Jul 20, 2020)
What creators say (YouTube)
No indexed video for this game yet.
This game on Twitch
Strengths
- Players who push through the opening 10 hours keep coming back: 63% of the 10-25h group rate the game positively, praising the blend of base-building and mech customization.
- Creative players unlock joy after initial friction: 13 positive mentions out of 43 reference the sheer breadth of customization options once the UI is mastered.
- Those who reach 25+ hours call the sandbox the real star: 69% positive feedback in that bracket highlights endless mission replayability and emergent storytelling.
Weaknesses
- Instability cripples the experience for early dropouts: every one of the 9 performance-related negative reviews describes crashes, saves lost mid-build, or pathfinding bugs.
- UI and controls frustrate despite deep customization: 17 negative mentions out of 18 rail against menu navigation that feels retro and counter-intuitive.
- First impressions skew negative: only 31% of players quitting under two hours rate the game favorably, citing unclear objectives and repetitive tutorials.
Who is it for?
Mech tinkerers willing to weather a rocky launch will find a sandbox that rewards patient exploration, but anyone expecting a smooth narrative or bug-free release should wait for updates.
Is M.A.S.S. Builder worth it in 2026?
It depends — the community is divided: 85% of 4,100 Steam reviews are positive (player score 54/100). Most-praised strength: Players who push through the opening 10 hours keep coming back. Current price: 24,50€.
Verdict
M.A.S.S. Builder’s 85% Steam score hides a startling gap: the game either clicks instantly or feels like a frustrating early-access draft. The moment you cross the 10-hour mark, the brilliant emergent gameplay starts to shine through the chaos.
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