M.A.S.S. Builder

About

“A future in where humans lived a prosperous century and technology advancing beyond space and time,” that was what humanity should have been if not for the sudden appearance of unknown beasts of the void. A large portion of humanity were gone in the moment.

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8
Based on
2202 reviews
Country Compatibility:
Languages:
Developer:
Vermillion Digital
Publisher:
Sekai Project
Engine:
Unreal Engine 4
Release date:
14 September 2025
Recent Steam reviews:
Mostly Negative (23)
All Steam reviews:
Very Positive (2202)

Game features

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Description

“A future in where humans lived a prosperous century and technology advancing beyond space and time,” that was what humanity should have been if not for the sudden appearance of unknown beasts of the void. A large portion of humanity were gone in the moment. War for the survival of humanity broke off all over the world, changing landscapes and settlements into warzones. Humanity were forced to relocate into shelters and reinvent their technologies into weapons of war, the M.A.S.S. technology.

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.

Recommended system requirements

minimum*

Requirement 1:
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*

Requirement 1:
Requires a 64-bit processor and operating system

User reviews

Othinus
Not recommended | 18 Jun 2026
18.1h played

This game is so good... well, only when it comes to customization. Building and customizing your own mech is genuinely awesome. It really feels like you're creating your own machine to go kick some alien ass, and

Helpful: 33
L0ng3r
Not recommended | 27 May 2026
2.6h played

Feels cool but needs work. Especially UI and descriptions. - menus in menus - custom styles not shared between parts (and there is a lot of them) - I would love to see a feature to save certain customisation options to

Helpful: 11
nuruddiniman96
Not recommended | 21 Jun 2026
22.2h played

Don't buy it unless it on sell. If you really want it Good You can build the mech of your dream Bad.... Gameplay....No point on fighting "Boss" in highther level in. For you will be attack by minion enemys They bullet

Helpful: 6
Epsilon 7
Recommended | 09 Jun 2026
18.9h played

This game is a lot of fun. there are lots of ways to approach combat. many ways to build your mech. one issue is that once you reach the end, its very grindy to get enough points to unlock the rest of the gear.

Helpful: 1
P1N35H34P
Not recommended | 27 May 2026
1.1h played

It's a real shame but I can't recommend this game as what it advertises. If you're looking for a gunpla building simulator this game is decent with some annoyance in unlocking parts. How do you know when you will start

Helpful: 11
Karia
Not recommended | 28 Jun 2026
7 min played

Holy CPU sink, I know my pc is getting old but 80% CPU load to run the Menu is insane. No way in hell I can play this on my current pc. For the record I have an i5-8400CPU, 32gb of RAM, and an RTX2070.... I should be

Helpful: 6