The year was 20XX, and the legendary fan translation of Celestial Chronicles —a JRPG that never left Japan—had finally dropped. But there was a catch: it was an .xdelta file, a "patch" containing only the differences between the original game and the new English version.
What is an XDelta Online Patcher?
Pokémon FireRed ROM
Let’s walk through a real-world example: patching a to the popular hack Pokémon Unbound .
