How many people are playing M.A.S.S. Builder right now?

M.A.S.S. Builder has 6 players on Steam right now, with a 24-hour peak of 21 and an all-time peak of 480 on Jul 2020.

What is the all-time peak player count of M.A.S.S. Builder?

480 concurrent players on Jul 2020.

M.A.S.S. Builder was released on Steam on 15 Sep 2025.

GameApp ID 956,680by Vermillion DigitalReleased 15 Sep 2025

WindowsEngine —

App ID956,680

Release date15 Sep 2025

Engine—

Install size10.1 GB

TypeGame

Last update21 Sep 2025

Steam Deck—

DLC0

DeveloperVermillion Digital

Changenumber38,342,058

Price$24.99

Packages0

PublisherSekai Project

SystemsWindows

Followers—

Depots1

M.A.S.S. Builder

Steam user reviews

Very Positive

84.9%· 4.1K reviews

Recent —

SteamPeaks Rating

84.5 Positive

Recent 30 days —

Playing now

−2 vs. yesterday

1.3%of peak

All-time peak

480

A permanent record of every observed change.

Export

M.A.S.S. Builder Update History · SteamPeaks