How many people are playing Flat 9 right now?

Flat 9 is app 3510310 on Steam. Player counts appear once the tracker has sampled it.

What is the all-time peak player count of Flat 9?

0 concurrent players on 15 Sep 2026.

When was Flat 9 released on Steam?

Flat 9 was released on Steam on 18 Mar 2025.

Status

SteamPeaks

Flat 9

GameApp ID 3,510,310by Alessandro ArcangeliReleased 18 Mar 2025

WindowsEngine —

View on SteamSteamCompare

App ID3,510,310

Release date18 Mar 2025

Engine—

Install size3.13 GB

TypeGame

Last update20 Mar 2025

Steam Deck—

DLC0

DeveloperAlessandro Arcangeli

Changenumber34,961,816

Price—

Packages0

PublisherAlessandro Arcangeli

SystemsWindows

Followers—

Depots1

Compare this game

Flat 9

Alessandro Arcangeli
Released 18 Mar 2025·App 3510310

Steam user reviews

Positive

100.0%· 30 reviews

Recent Overwhelmingly Positive · 100%

SteamPeaks Rating

85.7 Very positive

Recent 30 days —

How it works

Last seen

Sampled 2 hours ago · not a live figure

—of peak

All-time peak

15 Sep 2026

Update history

A permanent record of every observed change.

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All changes Changelists Builds News Store Achievements

Flat 9 Update History · SteamPeaks

Time (UTC)SourceWhat changedAddedEditedRemovedReference

13 Sep 2026

03:58:47Achievements3 definitions added+3——Schema snapshot

Definitions added · original values preserved

Status	Key	Previous value	New value
Added	ARCH_1_FLAT_9	—	End of the Line — You have reached the Flat 9, but something awaits you
Added	ARCH_2_COMPLETE	—	Flat 9 — Complete the game
Added	ARCH_3_ALL_ANOMALIES	—	Nothing Escapes You — You found every anomaly

Raw values