PSP saves are encrypted per game and tied to the console that created them. When Apollo (on PSP, or on Vita via Adrenaline) can’t decrypt a save or produces one the game rejects, you’re almost certainly missing one of two keys.
Piece 1: The Per-Game Save Key
Decrypting a PSP save needs that game’s save key. Apollo knows many keys already, but for games it doesn’t, you dump the key yourself with a PSP plugin:
- SGKeyDumper or SGDeemer — plugins that capture the save key while the game saves/loads.
- Apollo also ships its own key-dumper plugin tooling on the Vita build (Tools → PSP Key Dumper tools).
Community tip from the developer: if you dump a key Apollo didn’t have, use Apollo’s Export Save-game Key option and share the resulting gamekeys.txt — shared keys get added to future Apollo releases for everyone.
Piece 2: The Console FuseID (Vita/Adrenaline)
To correctly hash and re-sign PSP saves under Adrenaline, Apollo needs the console’s FuseID. Dump it once:
- In Apollo Vita, open Tools → PSP Key Dumper tools → Install PSP FuseID Dumper.
- Run the dumper in Adrenaline once; it writes
FuseID.bin. - Apollo detects and imports the file automatically from then on.
Putting It Together
With the game key known and (on Vita) the FuseID dumped, the normal flow works: decrypt the save, apply patches, and Apollo re-signs it with the right hashes. If a save still fails, verify the folder placement via the folder paths guide and confirm the game’s key is genuinely dumped — a key from a different game (or region variant) won’t decrypt your save.
Related Guides
Download Apollo · PSP hub · PS Vita hub · Install Apollo on Vita