How many people are playing Cosmic Ultramarine right now?

Cosmic Ultramarine has 0 players on Steam right now, with a 24-hour peak of 3 and an all-time peak of 3 on 9 Sep 2026.

What is the all-time peak player count of Cosmic Ultramarine?

3 concurrent players on 9 Sep 2026.

When was Cosmic Ultramarine released on Steam?

Cosmic Ultramarine was released on Steam on 11 Nov 2024.

Status

SteamPeaks

Cosmic Ultramarine

GameApp ID 3,296,760by 21st NostalgiaReleased 11 Nov 2024

WindowsEngine —

View on SteamSteamCompare

App ID3,296,760

Release date11 Nov 2024

Engine—

Install size651 MB

TypeGame

Last update27 Mar 2026

Steam Deck—

DLC0

Developer21st Nostalgia

Changenumber36,717,760

Price—

Packages0

PublisherGame Poetics

SystemsWindows

Followers—

Depots1

Compare this game

Cosmic Ultramarine

21st Nostalgia·Game Poetics
Released 11 Nov 2024·App 3296760

Steam user reviews

Very Positive

97.4%· 423 reviews

Recent —

SteamPeaks Rating

95.1 Overwhelmingly positive

Recent 30 days —

How it works

Playing now

−1 vs. yesterday

0.0%of peak

All-time peak

9 Sep 2026

Update cadence · public branch

RSS Follow on Discord Add alert

PICS live

166 days

Since last public build

27 Mar 2026, 08:53 UTC

—

Median interval

Pattern appears after five builds

Builds in 30 days

0 with patch notes · 0 unannounced

—

Downloaded in 30 days

Quiet · no builds in 30 days

All 1 builds since 2026 · UTC

When 21st Nostalgia ships

Click a cell to filter the builds table

0369121518

Cosmic Ultramarine Patches · SteamPeaks

Cosmic Ultramarine

Builds

All public

Major patches only

Date	Day	Time	Patch title	Build ID	Branch	Depots	Download Δ
27 Mar 2026	Fri	08:53	No patch notes · unannounced build	22530299	public	1	—

public branch · shipped todayother branchwide buildhas patch notes

Showing 1 of 1 builds · Δ is the compressed download for the public branch, available once the depot worker runsLoad older builds

Cosmic Ultramarine

When 21st Nostalgia ships

Cosmic Ultramarine

When 21st Nostalgia ships

Patch notes

Builds