M.A.S.S. Builder

Source: Steam
App ID: 956680
Developer: Vermillion Digital
Publisher: Sekai Project
Released: September 14, 2025

Commander, customize and build your Mechanical Assault Skeleton Suit (M.A.S.S.) and lead the fight against an alien invasion bent on exterminating the human race. The fate of humanity is in your hands.

Current players

4 observations from Oct 26 to Oct 28. Latest 13 players at Oct 28 09:05 UTC. Peak 13 at Oct 28 09:05 UTC. No collection gaps in this window.

24h Peak

2026 Peak

Oct 25 21:05 UTC

All-Time Peak

Oct 25, 2026 21:05 UTC

Live Top Seller

Weekly Top Seller

Price

Reviews

85% Positive

3.2K positive, 543 negative

Player History


Today	11	+5	+77.1%	13	13
Oct 27	6	-5	-45.8%	7	5
Oct 26	11	-1	-5.2%	12	8
Oct 25	12	Not Available	Not Available	14	12
Oct 22	7	+1	+24.4%	8	8
Oct 21	6	0	-3.6%	6	6
Oct 20	6	-3	-31.9%	7	6
Oct 19	9	Not Available	Not Available	10	4
Oct 16	7	Not Available	Not Available	7	7
Oct 14	6	0	-6.0%	6	6
Oct 13	6	-1	-9.2%	5	5
Oct 12	7	-2	-26.5%	11	3
Oct 11	9	-2	-18.0%	11	7
Oct 10	11	+5	+99.0%	12	12
Oct 9	5	+2	+73.4%	7	7
Oct 8	3	-3	-51.5%	3	3
Oct 7	7	-2	-23.7%	10	4
Oct 6	9	0	-3.3%	9	7
Oct 5	9	Not Available	Not Available	13	4
Oct 1	6	Not Available	Not Available	8	3

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MOBILE SUIT GUNDAM SEED BATTLE DESTINY REMASTERED24 players
Mecha Knights: Nightmare4 players
BREAK ARTS III8 players
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Current players

Player History

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