
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.
Modeled estimate, not a reported figure. How we estimate →
Prices
Each in the currency that store quoted — not converted: the gap between two rows is the publisher's pricing, not an exchange rate.
Every market we collect.
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0.14/day in the week to Aug 17 → 0.43/day in the week after.
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Each DLC is estimated with the same model as a game, then summed — a modeled figure, not reported DLC sales.
Updates
Build ids and update times come straight from Steam's PICS — the same source SteamDB reads. Patch history grows as we record new builds.
Engagement
Reviews
Themes across 803 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
多くのレビューにもある通りアクションゲームとしてはものすごく微妙だが アセンブルや塗装などは非常に深い沼となっていて時間が無限に溶けていく。 そちらだけで言えばガンダムブレイカーでやりたかったものの全てがここにあると言っていい。
Enemies are just bullet sponges
This game has a good concept and the mecha customization is good,but this game has so many problems. The game play is way too repetitive constantly fighting the same type of enemies in a either deserted snow land or dessert. Another massive problem is grinding to unlock parts to customize your mecha feels way to tedious to enjoy. I wish that they would do what project diva does and allow you to buy to unlock all the parts
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Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 24 chart moves that followed a price cut of more than 20% went a median of 9 places towards #1, and the 2,419 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English, Japanese, Simplified Chinese, Thai, Traditional Chinese
Hours played at review time, across 805 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
Litcherally spend my whole day on a single build only to realize the mission suck :sob:
this game has been in development since i was 19. i'm 25 now. almost all my play time is in customization, which is incredibly in depth.
Sometimes, it's best to read what's on the tin. M.A.S.S. Builder. A game about building battlemechs and taking them for a test in increasingly difficult missions. Most of the game actually revolves around building your own custom mech, whether it's from stock parts (but in METICULOUS detail) or even by making your own parts from basic shapes. Even for someone who can only make a collage out of stock parts, I found the building part to be rather fun. Though it would be nice if the more complex aspect wasn't obtuse and rather unintuitive but that's nothing Earth-shattering. I managed to figure out custom paints at least. Onto the gameplay part, the part where you're taking your mech for a (bumpy) test ride. I am playing with mouse/keyboard and am pretty satisfied with the controls. Didn't even need to rebind anything, and that's usually the FIRST thing I do in most games of this kind, 2D and 3D alike. But the gameplay is best described as a gem in the rough. On one hand, the game offers high-speed, Gundam-like action and even allows for dash-cancelling your attacks, but on the other hand, mechs still feel like mechs when it comes to combat, melee more than anything. And you'll be doing that a LOT, since ranged weapons don't pack half the power melee does. It feels as if the game has a bit of an identity crisis. The enemy numbers are pretty high (not exactly like Dynasty Warriors but still rather high) but already in chapter 3, the bigger ones start packing quite a wallop. Stop for 3 seconds, you get dogpiled on and your M.A.S.S. is blown to bits. And that's with Frames and Engines labeled as "built for sustained combat". Boss fights are... sometimes infuriating. The Quark types are colossal and VERY mobile for their size. Respawning enemies are mostly fodder you eliminate for ranged weapon ammo... but your ranged weapons are as effective against bosses as is throwing grapes at a charging rhinoceros. So most of the time, you're chasing the bosses around hoping not to get dogpiled on. You can avoid that in some fights by hitting the boss while flying, but Mission 19, for example, has enemies which actively aim at you and can take you down. The situation is similar when you're fighting enemy M.A.S.S. units. Bosses are even more mobile and elusive, often pack heavy ranged firepower, are accompanied by endlessly respawning grunts... and can always escape you with thrusters. And all boss types have VERY high HP, so the fights are awfully long with how you're constantly forced to chase down the bosses while constantly under attack from grunts. And some of them pack a serious punch, as if the bosses were not dangerous enough. Finally, there's a pretty serious flaw with the development sub-menu between missions. It can't be navigated, so higher level options simply can't be clicked on. This REALLY needs to be fixed ASAP. Conclusion: The game has a lot of potential both for "build-a-mech" players and those who just want the action part. But the boss fights really need some rebalancing and the player-used ranged weapons some buffing. It takes at least one entire magazine for taking down a GRUNT, so ranged firepower doesn't even tickle boss types. Maybe at least a reduction in the amount of grunts spawned during a boss fight. All in all, it's still a game I do recommend but also want to point out a few things I believe need improvement.
很好的游戏,虽有不足但瑕不掩瑜。以下是我个人的一些建议,望官方采纳: 1.重要的事情说三遍,完全汉化,完全汉化,完全汉化! 2.优化武器的打击手感 3.给手持远程武器添加可选的双持选项 4.加入更多实弹枪管模块(如榴弹发射器模块、火箭模块等) 5.添加加农炮之类的长身管炮类肩部武器 6.注明每个机体骨架模块和武器模块给机体和武器的性能影响
A "mech" game but none of the mech parts matter it's all astetic. This is just a bare bones character action game with a skilltree, and a model builder on the side.
I bought MASS Builder to build mecha, and I can confirm, it does that amazingly. You can design almost any kind of mecha you want with enough practice and knowledge, and with tools such as the save editor and the import/export system, you can learn new techniques with other people's creations. Many people vote this game down because the story isn't the greatest, the combat isn't the best, and the enemy ai isn't smart. You don't buy this game for mecha combat, that's what a game like Mechwarrior or Armored Core is for. This game is for building the mecha you have always dreamed of. If you want to build virtual Gunpla, this is a game for you
解限机的飓风就是估计就是在这游戏里捏的
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Where this game's players are, estimated from review languages.
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