Where Are AI The Somnium Files Save Files Located?
Where AI The Somnium Files keeps PSYNC saves and system data on PC, and what each file holds for recovery.
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AI The Somnium Files keeps saves as PSYNC files in its company folder under LocalAppData on Windows. Autosave and manual slots share distinct prefixes in the same tree. System data sits beside them for flags both modes reference.
Options split between a launcher ini in the folder and registry keys outside it. There is no native Mac or Linux port, so Proton prefixes mirror the Windows tree elsewhere. Copy the whole folder with the game closed for backup. Dream routes and bond values share the slot files, so copy the set whole.
Where AI: The Somnium Files stores this, by platform
%LOCALAPPDATA%\SpikeChunsoft\AI The Somnium Files
Holds PSYNC slot files plus autosave and system data. Options split between the launcher ini here and registry keys. Copy the whole folder for backup.
Frequently asked questions
My Somnium save crashed the load. How do I recover?
Restore the System.dat backup from the same SpikeChunsoft folder with the game closed. Progress files reference system flags, so a lone slot copy loads wrong. Keep Steam Cloud paused until the restored set loads once.
Are Somnium saves and settings in one place?
Slot progress lives in PSYNC files while options live in the launcher ini plus registry keys. Back up the whole company folder to carry both halves. Editing the ini with the game open gets overwritten on quit.
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