15th Prison Playtest Test app

A separate Steam app for testing 15th Prison, such as a staging branch, test server or playtest. It has no store page of its own: owners of the game get it in their library. It isn’t counted as a game or a release.

For: 15th Prison
Players now: Not counted yet
24-hour peak: —
Latest build: 17 May 2025, 14:32 UTC
Steam App: 3682590

Players, Last 30 Days

No player readings for 15th Prison Playtest in the last 30 days yet. We poll this game every 3 hours.

From the Steam Web API every few hours. Steam gives no count for an app nobody can launch, such as a closed playtest. We started counting on 28 Oct 2026. How we count

Public Builds

Public builds of 15th Prison Playtest, newest first
Build	Went live	After the one before
18502985	17 May 2025, 14:32 UTC	—

From Steam’s client network, within minutes of each change. Builds from before 28 Oct 2026, when we found this app, aren’t listed. How we count

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