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Yakuza Restored is a restoration patch for the original US release of Yakuza for PS2, that I hope will be a new way to experience the classic that started it all. It includes Japanese audio (undub), a revised script, and some redone graphical elements.
Step-by-step patching guide:
1. You need an ISO copy of the US version of Yakuza for PS2.
2. Download DeltaPatcher and extract the zip.
3. Download the patch and extract the zip.
4. Launch DeltaPatcherLite, under "Original file" select the original game ISO, under "XDelta patch" select the "Yakuza (USA) (Restored 1.0).xdelta" patch extracted from the zip in step 3.
5. On the cogwheel icon, I highly recommend checking "Backup original file", otherwise the original ISO file will be lost in the patching process.
6. Press "Apply patch" and WAIT. Don't touch anything even if it looks like the program isn't responding. On my machine it takes about 4 minutes to apply the patch, your mileage may vary.
7. You should now have another ISO with "PATCHED" in the name, that you can load up and play on an emulator or a PS2.
Optional if you intend to play the game on a PS3 using its PS2 emulation function:
8. Download the PS3 fix patch.
9. Launch DeltaPatcherLite again, but this time under "Original file" select the "PATCHED" file that resulted from step 7, and under "XDelta patch" select the "Yakuza (USA) (Restored 1.0) PS3 Fix v2.xdelta" from step 8.
10. Press "Apply patch". This fix is tiny so should complete in a matter of seconds.