M.A.S.S. Builder Cover Art

M.A.S.S. Builder (v1.0.2)

RPG 9.03 GB v1.0.2 2.1K views

Game Overview

Humanity’s last line of defense comes in the form of highly customizable combat frames built to fight the monstrous Quarks pouring out of the void. M.A.S.S. Builder is a fast-paced mech action RPG set after a catastrophic invasion turns a once-advanced future into a global war zone. As the commander of a private military force, you take contracts, support the remaining settlements, and pilot a Mechanical Assault Skeleton Suit through increasingly dangerous operations. The mood leans more toward stylish anime mech spectacle than grim military simulation, with enormous machines, flashing weapons, and room to make every pilot’s suit look distinct.

Combat centers on agile third-person battles where your M.A.S.S. dashes, boosts, shoots, slashes, and chains attacks against swarms of alien enemies and larger threats. Missions feed resources and equipment back into the core loop, letting you improve weapons, armor components, and combat-oriented stats to suit close-range, ranged, or balanced builds. Loadouts can be adjusted around preferred weapon types and abilities, while the suit’s mobility keeps encounters quick and aggressive rather than slow and tank-like. Progression encourages experimentation, especially as later challenges demand smarter positioning, better gear choices, and a build that complements the way you fight.

The standout feature is its remarkably granular assembly system: performance gear and visual parts are separated, so a powerful build does not have to look like a pile of mismatched loot. Players can reshape their machine’s silhouette with extensive armor pieces, colors, decals, proportions, and mechanical details, creating anything from a sleek hero unit to an absurdly overbuilt war machine. That makes it especially appealing to fans of Armored Core’s garage tinkering, Gundam model-kit aesthetics, and action RPG loot progression, though its combat is more arcade-driven than a hardcore mech simulator. M.A.S.S. Builder suits players who enjoy spending as much time perfecting a robot’s appearance as they do taking it into high-speed alien battles.

Screenshots

Installation

  1. Select the Download button at the top of this page to open UploadHaven.
  2. On UploadHaven, wait for any countdown, then select Free Download. Optional: UploadHaven Pro for faster downloads.
  3. When complete, extract the archive to a M.A.S.S. Builder folder using 7-Zip.
  4. Open the extracted folder and start the game normally.
  5. For errors, check Setup Guide & Troubleshooting below. Keep your security software enabled.

System Requirements

  • 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
Last Updated
Status
Online
Looking for a newer update? Request an update
Skip the browser next time Browse, download, extract, and organize your games with the SteamUnlocked Launcher.
Get the Launcher

Setup Guide & Troubleshooting

How do I fix missing DLL errors for M.A.S.S. Builder (v1.0.2)?

After extracting M.A.S.S. Builder (v1.0.2), navigate to the _Redist or _CommonRedist folder inside the game directory and install DirectX, Vcredist, and any other dependencies included.

What should I do if the downloaded file is corrupted?

The full archive is 9.03 GB — make sure your download completed fully before extracting. Use 7-Zip to extract the files. If you still see a "file corrupted" error, re-download and try again.

Do I need to run the game as administrator?

Usually, no. Start the game normally from the extracted folder. If you see a permissions or save error, check that the folder is writable and follow the game's documented fix. Only grant administrator access when a trusted game's specific setup requires it.

How do I update my GPU drivers for this game?

M.A.S.S. Builder (v1.0.2) requires a NVIDIA GeForce GTX 1050 or better / AMD Radeon RX 560 or better or equivalent. Update your NVIDIA or AMD drivers to the latest version for the best performance.

The game won't launch — what should I try?

Check that extraction completed and your PC meets the system requirements. Note any error message before choosing a fix. If it identifies a missing runtime, install the required DirectX components or Microsoft Visual C++ Redistributable from Microsoft.

My antivirus is blocking the game — is it safe?

A warning needs to be investigated; the download source alone cannot confirm that a file is safe. Keep your security software enabled and review the detection details. Do not run or restore a flagged file unless you have verified that it is a false positive. If you are unsure, leave it quarantined.

Need more help? Browse our FAQ & Troubleshooting Guide for solutions to common issues.
Looking for something else? Explore all games on SteamUnlocked →
Saved to My Library View Library