The specifics can vary widely based on who created the repack and their goals. Always research the source and do a virus scan if you have concerns.

Historically, installing games like Gran Turismo 6 on real hardware required downloading dozens of consecutive, fragile PKG update files. PC repacks circumvent this nightmare by pre-compiling all game updates and DLC into the game directory. Modern Simulation (GT Sport and GT7) Gran Turismo Series - Download Links : r/abandonware

Emulated through the RPCS3 PlayStation 3 emulator.