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The modern compatibility index for Steam games on Linux.

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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.

The Monster Inside · Protondex

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The Monster Inside

#665490

A film noir style audio-visual novella. A mysterious woman... a string of murders... and a man with a hidden past.

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Recommendation

ProtonGreat

Proton and native both rate great; recommending proton.

Compatibility

Proton

Great

!StaleLow confidence

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

Native

Great

!StaleLow confidence

1 report · Low confidence: all reports predate a major ecosystem update.

Desktop

Great

!StaleLow confidence

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

HandheldUnknown

No reports yet

Anti-cheatUnknown

No anti-cheat reports yet

Details!Stale4 reports · updated May 23, 2025More

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

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

Guide cards

No guide cards yet — curated troubleshooting for The Monster Inside will appear here.

Reports (4)

PathDeviceFreshness

Showing 4 of 4 reports

GreatProtonDesktopHistorical · ProtonDB
May 23, 2025
Imported from ProtonDB (ODbL)
GreatNative (Linux build)DesktopHistorical · ProtonDB
Feb 25, 2023
Imported from ProtonDB (ODbL)
GreatProtonDesktopHistorical · ProtonDB
Dec 4, 2022
Imported from ProtonDB (ODbL)
GreatProtonDesktopHistorical · ProtonDB
Apr 26, 2021
Imported from ProtonDB (ODbL)

End of reports