It uses the internal Sony "PS Classics" emulator. This means compatibility is high for games already available on the PS Store, but other titles may suffer from graphical glitches (e.g., missing textures) or crashes .
When Sony releases a "PS2 Classic" on the PS4 Store, they aren't just running a raw disc image. They wrap the game in a specialized emulator package (based on the "ps2_emu" and "ps2_netemu" engines) that allows the PS4 to natively read and play the title. ps2 fpkg
Even with a perfect setup, not every PS2 game runs flawlessly. Here are common problems and fixes: It uses the internal Sony "PS Classics" emulator
This is not a "remaster." It is emulation. They wrap the game in a specialized emulator
: You can find the tool's source code and releases on GitHub .
: These files leverage the internal PS2 emulator built into the PS4 (originally used for "PS2 Classics" on the PlayStation Store) to play titles that were never officially released for the newer console. Installation
The PS4 uses Sony's own "PS2 Classics" emulator to run these games.