List of PS2 Emulated Games that got a physical release on PS4 discs - Wololo.net
Play PS2 Classics (.iso) on PS4 (5.05) - CFWaifu
For those interested: PS2 Classic versions of GTA III, Vice City, San Andreas (only in the Triology bundle, the stand alone is the mobile port), and Liberty City Stories are still available
Amazon.com: Destroy All Humans! - PS2 Classic (Limited Run #370) - PlayStation 4
Play PS2 Classics (.iso) on PS4 (5.05) - CFWaifu
Complaining about Prices of PS2 Classics on PS4? - YouTube