PS2 Emulation on PS4 Confirmed! Sony Bringing PS2 Games to PS4. - [LTPS #179] - YouTube
Stephen Totilo on Twitter: "The PS4's library of PS2 games is shameful. Doesn't help that it takes 50 (!) button presses to reach the console store's "PS2 on PS4" section. Nor that
How to play PS2 games on your jailbroken PS4 9.00 and lower - PC Guide