M.A.S.S. Builder overview

Overview

M.A.S.S. Builder comes from Vermillion Digital and is published by Sekai Project. It arrived on Steam on Sep 14, 2025, and it sits naturally among Single-player, Multi-player, Co-op, Online Co-op, Full controller support, Steam Cloud, and Family Sharing. SteamPulse tracks it across Windows and Steam so readers get a quick useful snapshot, not just a wall of numbers.

Players and reviews

M.A.S.S. Builder's latest SteamPulse observation recorded 11 players at 23 September 2026 - 04:44:05 UTC, with a tracked peak near 124. This peak is the highest value in the available SteamPulse record and may not include activity before tracking began. Player reaction is 86% positive across 4,040 reviews.

Language and system requirements

M.A.S.S. Builder is available in 5 languages including:

3 regional rating boards including dejus, steam germany, and igrs

Sales, recommendations, and streams

M.A.S.S. Builder has sold up to 122,000 units and has 3,731 Steam recommendations. The estimated VGI revenue is $2,300,000. On Twitch, 0 streamers are live with around 0 total watchers.

M.A.S.S. Builder overview details

M.A.S.S. Builder combines live player counts with reviews, pricing, platform support, Store metadata, dated player history, media, recent news, and related games.

Steam Store 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…

SteamPulse editorial summary

M.A.S.S. Builder is listed as a game with $24.99. It supports Windows, belongs to Single-player, Multi-player, Co-op, Online Co-op, Full controller support, Steam Cloud, and Family Sharing, and is associated with Action, Indie, RPG, and Strategy. SteamPulse's latest observation records 11 players at 23 September 2026 - 04:44:05 UTC, a tracked peak of 124, and 86% positive reviews.

Overview tags

Early AccessAction RPGMechsCharacter CustomizationRobotsGun CustomizationIndieHack and SlashSci-fiAnimeShooterActionSingleplayerRPGFuturistic

Support and legal notes

Real questions answered from SteamPulse data, including live players, monthly momentum, review sentiment, regional audience signals, Twitch activity, and current Steam pricing.