M.A.S.S. Builder

Dive into the thrilling world of 'M.A.S.S. Builder', an Action RPG where you're tasked with defending humanity from an alien invasion. Build and customize your Mechanical Assault Skeleton Suit (M.A.S.S.) to embody your personal style and combat preferences. Engage in fast-paced battles, obliterate hordes of alien Quarks, and immerse yourself in a rich, post-apocalyptic universe. With unparalleled customization options for your suits and weapons, 'M.A.S.S. Builder' delivers both creativity and action-packed combat in one compelling package. Humanity is counting on your leadership—do you have what it takes to save the world?

Vermillion Digital
Sekai Project
September 14, 2025
61 % Positive (2116 reviews)

Features

In-depth Suit Customization

M.A.S.S. Builder allows players to customize every aspect of their Mechanical Assault Skeleton Suit, separating aesthetics from stats for maximum creativity.

Fast-Paced Combat

Engage in thrilling battles against alien hordes with dynamic movement systems and a vast arsenal at your disposal.

Battle Alien Quarks

Face off against relentless alien species called Quarks and their powerful giant leaders in the game.

Online Co-op Multiplayer

Team up with friends and join forces to combat humanity's extraterrestrial threats in M.A.S.S. Builder.

Extensive Weapon Customization

Create weapons that suit your style with hundreds of parts to mix and match for both appearance and function in the game.

Post-Apocalyptic Universe

Immerse yourself in a compelling world reshaped by alien invasions filled with rich lore and high stakes.

Third-Person Shooter Perspective

Experience the action and tactics from a third-person viewpoint, giving you clear insight in battles.

Multilanguage Support

The game supports multiple languages, including English, Japanese, Simplified Chinese, and more.

Key Features

Single-player
Online Co-op
Steam Cloud
Family Sharing

Frequently Asked Questions

What is M.A.S.S. Builder about?

'M.A.S.S. Builder' is an Action RPG where players pilot customizable mechanical suits to battle alien forces threatening humanity's existence.

Can I customize my M.A.S.S. pilot suit?

Yes! The game features an extensive customization system, allowing you to modify both the appearance and functionality of your suit.

Does the game support multiplayer gameplay?

Yes, M.A.S.S. Builder includes an online co-op mode so you can team up with friends to battle alien threats.

What types of enemies will I face?

In the game, you’ll battle against the Quarks, a horde of beastly aliens, as well as their powerful giant counterparts.

What platforms is M.A.S.S. Builder available on?

The game is currently supported on Windows systems.

What makes M.A.S.S. Builder unique from other games?

The game stands out because of its deep customization that separates aesthetics from stats, enabling you to craft a truly personal mechanical suit.

Is there a storyline in M.A.S.S. Builder?

Yes, the game features a rich, post-apocalyptic narrative that immerses players in a world where technology and survival collide.

How big is the game's file size?

The game requires at least 3 GB of available storage.

Genres

Tags

Action RPG Mechs Character Customization Robots Gun Customization Indie Hack and Slash Sci-fi Anime Shooter Action Singleplayer RPG Futuristic Multiplayer Third-Person Shooter Combat Third Person Post-apocalyptic Crowdfunded

System Requirements

Minimum

Os

Windows 7, Windows 8.1, Windows 10 (64-bit versions only)

Memory

8 GB RAM

Storage

3 GB available space

Graphics

NVIDIA GeForce GTX 1050 or better / AMD Radeon RX 560 or better

Requires

Requires a 64-bit processor and operating system

Processor

Intel Core i5 or better / AMD Phenom II X3 or better

Recommended

Os

Memory

Storage

Graphics

Requires

Requires a 64-bit processor and operating system

Processor

Supported Languages

Language Interface Subtitles Audio
English
Japanese
Simplified Chinese
Thai
Traditional Chinese

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