Report: PES 2014 Save Data (PSP)

• Updates transfers (players moved between clubs)
• Updates kits (if the save is bundled with a patched ISO)
• Updates promoted/relegated teams
• Cannot add new stadiums or drastically change graphics (that requires ISO modding)

The Quest for PES 2014 Save Data on PSP: A Deep Dive

• PPSSPP saves map directly to host files; easier to experiment because no UMD signing/account constraints.
• Importing a physical PSP save:
  1. Create two saves differing only in one known change (e.g., change team name).
  2. Use xxd to produce hex dumps; run a diff to find changed offsets.
  3. Inspect surrounding bytes for length prefixes or repeated records.
  4. Write Python parser to read bytes at offsets: struct.unpack(">I", data[offset:offset+4]) (use > for big-endian).
  5. Modify value, recompute checksum if needed, and test.
  1. Backup save: