M.A.S.S. Builder Coming Out of Steam Early Access

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M.A.S.S. Builder Coming Out of Steam Early Access

Version 1.0.0 Will Feature A New Weapon Attachment System Alongside New Missions To Round Out This Complete Release

Los Angeles, CA — September 12th, 2025

Sekai Project is proud to announce that M.A.S.S. Builder, a customizable mecha action game and the first release by Thai developer, Vermillion Digital, will be exiting Steam Early Access and releasing worldwide at 6:00 PM PST, September 14, 2025. First released in to the Steam Early Access program on September 14, 2019, the update to version 1.0.0 will see the implementation of the new Weapon Attachment System.

In addition to several bug fixes, new missions will be added that will further flesh out the story of M.A.S.S. Builder. Use the versatility of powerful weapon customization to take the fight to the alien invaders and secure the survival of the human race on Earth.

https://store.steampowered.com/app/956680/MASS_Builder/

What’s New in Version 1.0.0

Weapon Attachment System
First announced in August 2025, the Weapon Attachment System offers additional cosmetic customization options for the variety of weapons that players have at their disposal.

Close combat, melee weapons, shields, bullet-type shooters, energy-type shooters, and bullet-type launchers can now be attached to specific parts of a M.A.S.S. unit
Energy-type launchers however cannot be attached as they behave differently compared to the above weapons
Attachment style options include “hide” which won’t appear attached (as was the case before) and “dual” where the attached weapon will appear attached on both sides of the attachment point. Please note, this is purely cosmetic
More slot choices are available to attach bullet-type launchers
Rotation and scale offsets have been greatly expanded. Rotation offset now goes from -180° to 180° while the scaling offset now ranges from 20 to 180
Additional decorative options to have unequipped weapons stay visible on a M.A.S.S. unit versus simply being hidden in the past

Additional Missions
New missions will also be added in the 1.0.0 full release and give players a satisfying conclusion to this fast-paced action game. This includes a mission where the player will be swarmed by the alien invaders known as Quarks. The fighting will prove to be a challenge but have no fear as the W.D.F. (World Defence Force) and your allies will also be ready for the fight. As they encircle the perimeter, they will even join in the fight against the horde of Quarks.

These missions will further flesh out the story in the M.A.S.S. Builder universe. Will your journey lead to the salvation of the human race? What will be learned about the origins of the Quarks and why they invaded Earth and seek the eradication of humanity?
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Additional Refinements and Bug Fixes
While the original push was to implement what was slated to be updated in Version 0.13.0, the developers felt it was more important to get M.A.S.S. Builder to the finish line with the upcoming release of Version 1.0.0.

Combat aspects have been adjusted to make gameplay smoother
Bosses have more windows of attack when players use melee attacks
Improved boss hitbox that follows the appendage used in attack rather than just a circle around their body, making it easier for players to dodge attacks at all range types

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About M.A.S.S. Builder
“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.

M.A.S.S. Builder is a recipient of the Unreal Dev Grant, and a winner at the 2019 Game Developer World Championship (GDWC) in the Pro category, and a finalist for Best Visual Art at the 2022 Taipei Game Show in the Indie Category.

M.A.S.S. Builder
Developer: Vermillion Digital
Platform: Steam, Epic Game Store, Greenman Gaming
Price: $24.99
Release Date (Full Release): September 14, 2025