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The modern compatibility index for Steam games on Linux.

Steam · Linux · Proton & Native

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Protondex is an independent community compatibility index and is not affiliated with Valve, Steam, Proton, CodeWeavers, or ProtonDB.

Some historical compatibility records originate from ProtonDB's data export under the Open Database License (ODbL) v1.0; Protondex publishes a periodic public dump of its compatibility database under the same license. View the ODbL.

UNTITLED · Protondex

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UNTITLED

#639770

Post Code FF: Initializing startup sequence of: UNTITLED. Puzzle course loading… Logic test loading… Discovery test loading… Loading complete. Please contact local administrator to begin the training course.

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Recommendation

ProtonGreat

✓CurrentLow confidence

Only Proton reports exist so far.

Last report May 22, 2026

Compatibility

Proton

Great

✓CurrentLow confidence

3 reports · Low confidence: very few recent reports yet.

NativeNone

No native Linux build — Proton only

Anti-cheatUnknown

No anti-cheat reports yet

Reports(3)

Most reports here are historical ProtonDB imports — be the first to add a fresh UNTITLED report.

Add a fresh report

PathDeviceFreshness

Showing 3 of 3 reports

GreatProtonDesktopHistorical · ProtonDB
May 22, 2026
Imported from ProtonDB (ODbL)
GreatProtonDesktopHistorical · ProtonDB
May 3, 2026
Imported from ProtonDB (ODbL)
ReadyProtonDesktopHistorical · ProtonDB
Feb 14, 2023
Imported from ProtonDB (ODbL)

End of reports