How many people are playing Undersea Post Office Sim Playtest right now?

Undersea Post Office Sim Playtest is app 5270420 on Steam. Player counts appear once the tracker has sampled it.

What is the all-time peak player count of Undersea Post Office Sim Playtest?

0 concurrent players on 17 Oct 2026.

When was Undersea Post Office Sim Playtest released on Steam?

Undersea Post Office Sim Playtest was released on Steam on 21 Sep 2026.

Status

SteamPeaks

Undersea Post Office Sim Playtest

BetaApp ID 5,270,420by ElNurReleased 21 Sep 2026

Playing now

All-time peak

21:09 UTC · 19 Oct 2026steampeaks.com

—Engine —

View on SteamSteamCompare

App ID5,270,420

Release date21 Sep 2026

Engine—

Install size669 MB

TypeBeta

Last update14 Sep 2026

Steam Deck—

DLC0

DeveloperElNur

Changenumber39,070,891

Price—

Packages0

Publisher—

Systems—

Followers—

Depots2

Compare this game

Undersea Post Office Sim Playtest

ElNur
Released 21 Sep 2026·App 5270420

Steam user reviews

Not enough reviews yet

0 so far · summary at 10

SteamPeaks Rating

Not enough reviews yet

Rated from 10 reviews

How it works

Last seen

Sampled 3 hours ago · not a live figure

—of peak

All-time peak

17 Oct 2026

Launch

Unlocked 21 Sep 2026, 17:00 UTC

28 days ago · tracking every five minutes

Regional unlocks · UTC

Global unlock

Live standing

Waiting for the first samples

Hour 678 of the launch window

Update cadence · public branch

RSS Follow on Discord Add alert

PICS live

35 days

Since last public build

14 Sep 2026, 22:43 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 ElNur ships

Click a cell to filter the builds table

0369121518

Undersea Post Office Sim Playtest Patches · SteamPeaks

Undersea Post Office Sim Playtest

Builds

All public

Major patches only

Date	Day	Time	Patch title	Build ID	Branch	Depots	Download Δ
14 Sep 2026	Mon	22:43	No patch notes · unannounced build	25310275	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

Undersea Post Office Sim Playtest

When ElNur ships

Undersea Post Office Sim Playtest

When ElNur ships

Patch notes

Builds