15th Prison −30%

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15th Prison is a horror escape game. There is no exit from this prison. But examine your surroundings carefully and do not ignore any abnormalities. Take the envelope in each block and move on. Your carelessness may result in death.

Developer: Zettanium
Released: 20 May 2025
Price: $2.79 ~~$3.99~~
Platforms
Languages: English +11

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Update posts

0 posts

Posts announcing an update, tagged as patch notes or not

Last 90 days · as of 28 Oct, 04:59 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.

News checked every 30 days. Observed since 28 Oct 2026.

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

Announcements

2 June Update Patch notes
2 Jun 2025 · Community Announcements
23 May Update Patch notes
23 May 2025 · Community Announcements
21 May Update Patch notes
21 May 2025 · Community Announcements
15th Prison Coming Soon!
2 Oct 2024 · Community Announcements

From the game’s Steam news feed, last checked 28 Oct, 04:59 UTC. An announcement is not a build: games can update without posting. Every public build we saw is on the Builds tab.

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