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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.

Once Upon A Mind - A Little Too Friendly · Protondex

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Once Upon A Mind - A Little Too Friendly

#3690750

A story-rich psychological horror inspired by real-life experiences. Follow Emily, 23, as she moves to Brooklyn for a fresh start, but finds herself drawn into a slow spiral of obsession and control. Featuring voice acting, this atmospheric and grounded experience is deeply unsettling.

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Recommendation

ProtonGreat

Only Proton reports exist so far.

Compatibility

Proton

Great

!StaleLow confidence

1 report · Low confidence: very few recent reports yet.

NativeNone

No native Linux build — Proton only

Desktop

Great

!StaleLow confidence

1 report · Low confidence: very few recent reports yet.

HandheldUnknown

No reports yet

Anti-cheatUnknown

No anti-cheat reports yet

Summary based mostly on historical data from ProtonDB. Fresh reports from your setup help keep it current.

Freshness:!Stale1 report · last updated Jun 11, 2025

The newest report is over a year old — compatibility may have changed since.

Guide cards

No guide cards yet — curated troubleshooting for Once Upon A Mind - A Little Too Friendly will appear here.

Reports (1)

PathOutcomeDeviceFreshnessAnti-cheat

1 of 1 report

GreatProtonDesktopHistorical · ProtonDB
Jun 11, 2025
Imported from ProtonDB (ODbL)