This is a technical but legal alternative if you own a copy of the game. Emulators like RPCS3 (a PS3 emulator) can run Fight Night Champion on a powerful PC. The compatibility is good, though performance can vary based on your system's specifications. This requires a legitimate copy of the game's data, which can be dumped from a disc you own.

Reputable online communities like GBAtemp, Wololo, and the PS4 Homebrew subreddit are excellent places to find current, vetted information, guides, and discussions.

PKG stands for "package". It's the file format Sony uses to distribute all installable content for the PS4, including games, system updates, and DLC.