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A separate Steam app for testing 
Half-Life, 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.
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
| Build | Went live |
|---|---|
| 26231270 |
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
More Test Apps For Half-Life| App | Players now |
|---|---|
| HALF-LIFE: CROSS PRODUCT | — |
| Half-Life Arena | — |
| Half-Life: ESCAPE 2.0 | — |
| Half-Life: Element 64 | — |
| Half-Life: VR Mod | — |
| Zombie Panic! | — |
