About M.A.S.S. Builder
M.A.S.S. Builder is a mech action RPG developed by Vermillion Digital and published by Sekai Project. Full Steam release: 14 September 2025.
Humanity has been driven into shelters by the Quarks, monstrous beasts from the void, and its answer is the Mechanical Assault Skeleton Suit. As commander of a private military company you design your own M.A.S.S., choosing armour pieces for every body section and assembling weapons from barrels, triggers and accessories. Cosmetic parts carry no stats, so your mech can look exactly how you want while the performance comes from separate frame tuning and tech slots. In missions you dash across the battlefield on boosters, cutting through swarms of Quarks and facing giant ones that hunt you down.
Key Features
- Deep mech editor – armour for every body section.
- Modular weapons – hundreds of parts to combine.
- Style without penalty – cosmetic parts carry no stats.
- Booster combat – fast movement across the battlefield.
- Giant Quarks – huge aliens that hunt you.
PC Version and Compatibility
Minimum requirements: 64-bit Windows 7, 8.1 or 10, Intel Core i5 / AMD Phenom II X3, 8 GB RAM, GeForce GTX 1050 / Radeon RX 560, 3 GB storage. Available in English, Japanese, Simplified and Traditional Chinese and Thai (no Polish, German, French, Italian or Spanish language version).
Global Activation & What You Receive
You receive a digital Steam key for the standard game. It is a Global key with no regional restriction, so it works on a Steam account in any country. In the Steam client choose Games → Activate a Product on Steam, enter the code and the game is added to your library permanently.
Why Buy This Game?
M.A.S.S. Builder suits mecha fans who enjoy spending hours in a garage perfecting both looks and loadout before heading into fast action. The key is available at Urazon. Age rating: USK 16.
Related Games
If tuning a mech in the garage is half the fun for you, Armored Core VI: Fires of Rubicon takes that idea to its peak with intricate part builds and punishing boss fights on a ruined planet. DAEMON X MACHINA EU also pairs a private mercenary outfit with fast aerial mech combat against giant enemies, which makes it a close match for the Quark hunts. For a lighter, local multiplayer take on giant robots, Override: Mech City Brawl lets friends smash city blocks while brawling as towering mechs. And Brigador Killers trades the third-person view for an isometric angle, sending heavy war machines through fully destructible neon cityscapes.
