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SLEEPLESS Nocturne
#4217610An erotic fantasy visual novel from the twisted mind of Sei Shoujo of Bible Black fame. A pair of college students wanders into Black Rose Manor, an isolated estate located deep in the mountains once again.
Recommendation
ProtonPerfect
Needs confirmationLow confidence
Only Proton reports exist so far.
Last report Feb 7, 2026
Compatibility
Proton
Perfect
Needs confirmationLow confidence
1 report · Low confidence: very few recent reports yet.
NativeNone
No native Linux build — Proton only
Anti-cheatUnknown
No anti-cheat reports yet
Reports(1)
Most of this is historical ProtonDB data (newest from Feb 7, 2026) and needs a fresh report to confirm it still holds.
Add a fresh report