The Complex: Expedition

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When a routine expedition into The Complex goes horribly wrong, you're left alone and lost, wandering the seemingly infinite maze of hallways, otherwise known as the Backrooms. Might there be something following you?

Developer: pgWave
Released: 18 Jul 2025
Price: $14.99
Platforms
Followers: 11,501
Steam Deck: Unsupported
Languages: English
Series: The Complex

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Public builds

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No reading yet

Counted once we have watched for 90 days (since 21 Oct 2026)

Last 90 days · as of 27 Oct, 22:32 UTC

How this is measured

Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.

Checked within minutes of each Steam change. Observed since 21 Oct 2026.

We see a game's builds only from the day we started watching it. Before that we know just the build it was on, so counts over a window are shown only for games watched for the whole window.
A build is not necessarily a content update: developers also ship fixes, and some builds change only files players never see.

Source: Steam client network (PICS), App info, public branch. Full methodology

Latest public build

29 Jun, 19:10 UTC

Build 23971430

Update posts

2 posts

Posts announcing an update, tagged or not

Last 365 days · as of 21 Oct, 14:37 UTC

How this is measured

Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.

An announcement is not a build. Developers can ship updates without a post, or post about several updates at once.
Untagged posts are recognised from their words, so a few updates are missed and a few other posts may be counted. Tagged posts are marked Patch notes on the Updates tab; recognised ones are marked Update.
Older posts are being read back through each game's history, most played games first, so months before October 2026 fill in over the coming days.

Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology

Typical gap between builds

Not enough builds yet

Public Builds

Public builds of The Complex: Expedition, newest first
Build	Went live	After the one before	Patch notes
23971430	29 Jun, 19:10 UTC	—	Autosave Implemented

From Steam’s client network, last checked 27 Oct, 22:32 UTC. Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count

Earlier Updates

Updates to The Complex: Expedition announced on Steam before 21 Oct 2026, newest first
Posted	After the one before	Update
29 Jun 2026	70 days	Autosave Implemented Patch notes
20 Apr 2026	—	Update to The Complex: Expedition Update

Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count

Test And Staging Apps

Separate Steam apps for test and staging versions of The Complex: Expedition
App	Players now	24-hour peak	Latest build	Builds seen
The Complex: Expedition Playtest · App 2264370	Not yet	—	14421135 · 19 May 2024, 19:29 UTC	1

Separate Steam apps for test, staging and playtest versions of The Complex: Expedition. They have no store page, so they aren’t counted as games or releases. Builds come from Steam’s client network, players from the Steam Web API every few hours. Steam gives no count for an app nobody can launch. How we count

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Build

Went live

After the one before

Patch notes

23971430

29 Jun, 19:10 UTC

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Autosave Implemented

Posted

After the one before

Update

29 Jun 2026

70 days

Autosave Implemented Patch notes

20 Apr 2026

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Update to The Complex: Expedition Update

App

Players now

24-hour peak

Latest build

Builds seen

The Complex: Expedition Playtest · App 2264370

Not yet

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14421135 · 19 May 2024, 19:29 UTC