
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.
About


Genres
Add-ons
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 804 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
If you Love Mechs it is very worth it.
If you Like Mecha and want to build your own I 100% recommend this game
"Mom, can we have Gundam Breaker?" "We have Gundam Breaker at home" Gundam Breaker at home: [edit after some more playing]: don't go in expecting Armored Core or you'll be seriously disappointed, as the quote at the top says this is pretty much Gundam Breaker without a franchise attached and with actual enemy/mission variety and plays as such, you play this to get parts to build your dream mech, not for the story
Media

Related
Related
Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
This and every other Pro feature is free until October 20, 2026. A free account is all it takes.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 23 chart moves that followed a price cut of more than 20% went a median of 14 places towards #1, and the 2,515 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 806 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
M.A.S.S Builder es un juego de construccion de mechas y es un juego muy de nicho, muy.. cafe para cafeteros. La libertad que tienes a la hora de crear tu mecha y personalizar tanto la estetica de la armadura como la estetica de las armas es muy muy buena. No solo por la cantidad grande de partes, sino que ademas el juego te permite añadir formas nuevas y personalizar hasta en que posicion quedan las distintas armas. ¿Ahora, y el resto? Los graficos, sin mas. La historia tipo anime shonen, meh, el gameplay muy torpe y muy meh, la meta progresión y las "builds" directamente mala, el combate tiene 0 profundidad, las misiones son todas de tipo arena (llegas a un mapa pequeño, matas oleadas de bichos y a correr), el combate tiene 0 profundidad... El juego puede llegar a ser divertido a ratos, sobre todo si eres muy fan de los mechas y los juegos asiaticos de este tipo, pero si tuviera que darle una nota, le daria un 5, quizas un 6 por la personalización. En cuanto a contenido.. en las 7 horas que llevo me da la sensación de que no he llegado ni a la mitad (quizas un tercio), aparte de eso, el juego ofrece lo que ofrece desde el principio, es decir, lo mismo que haces en la primera hora de juego lo vas a hacer en la septima y en la hora numero 50. Conclusion: ¿Recomendaria este juego? Pues para el publico general NO, solo lo recomendaria si eres muy muy fan del anime, de los juegos asiaticos y de los mechas (si, las tres cosas juntas) ya que la fantasia de crear el mecha de tus sueños (tanto en armadura como armas) creo que la cumple muy bien, pero en el resto de apartados flojea demasiado.
I like big robot :D
The grindyness and odd difficulty scaling between patches aside, this game is the definitive "Build your own Mecha" experience. The sheer amount of customisation currently available is phenomenal! And the game truly shines in those minute detailings where you spend half an hour trying to etch in the correct little armour piece onto the hip of your frame. Unfortunately, as previously mentioned, the game is just not quite there in it's entirety yet. The customisation is carrying a lot of weight, but gameplaywise, the difficulty is in a state of constant flux. Between patches I've come back to drastic changes at times, which would nullify the validity of my build entirely or suddenly make certain builds completely dominant. Granted, this is an Early Access game, and I hope the devs manage to find their perfect balance in the future. There are quite a few missions available, but due to the necessity of grinding for parts, you will find yourself revisiting many missions in the campaign, hunt section and also challenges to obtain all the armour pieces you're after. Especially the credit grind is real, as purchasing one upgrade often will leave you with nothing but pennies and you'll have to rush back into the next mission just to be able to afford that crotch plate you were eyeing up after the last upgrade. Given all that, I still believe the amount of customisablity strongly outweighs the deficits in the shifting nature of a game still being worked on. I look forward to seeing the final product when the devs eventually reach it. Multiplayer is definetely enjoyable, but unfortunately the missions are quite few at the time of writing and the difficulty for some insane reason is locked into Very Hard, which ruins the experience of "Showing my friend who just bought this game some co-op fun" as they will find themselves being tossed left right and centre with no abandon. Again though, these are definetely Early Access Pains, and given time, I can easily see the devs remedying this and providing us with a fantastic experience. They post devlogs fairly regularly and are eager to show us what they've been dabbling with, which is always a commendable and good thing. If you like mecha and dynasty warriors esque gameplay, and don't mind the big ol' grind, this might just be a match made in heaven for you!
I'm gonna be honest, there's a serious melee bias in this game and I don't like it. That's petty as hell, sure, but it's still a complaint.
Its an awesome game. I'm a sucker for customization and this game has tons of it! Not only can you completely customize your mechs you can also make your own customized weapons. Great game for GUNPLA fans. You have to complete missions to unlock blueprints for more armor and weapon pieces. But the arena style battles are very quick and enjoyable.
It's a solid hack-and-slash as well as extensive and detailed mech builder with brilliant graphics, don't know what more you could ask for.
A great mech game for all to enjoy, not perfect but great all the same.
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.
Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| $3M | 4.7K | 87% | $29.99 | |
| $3M | 3.9K | 67% | $39.99 | |
| $3M | 4.5K | 94% | $19.99 | |
| $3M | 4.6K | 96% | $22.49 | |
| $3M | 5.2K | 86% | $17.99 | |
| $3M | 32.8K | 90% | $3.99 |
Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| $8.1M | 6.9K | 84% | $49.99 | |
| $408 | 2 | 0% | $7.99 | |
| $2.4M | 6.1K | 63% | $21.24 | |
| $541.5K | 941 | 92% | $14.99 | |
| $44.4K | 121 | 51% | $14.99 | |
| — | 0 | — | — |