Your only real options:
Even when running via an unofficial PKG, the game is celebrated for these core features:
The most malicious "PKG Exclusive" is a simple asset swap. Scammers take the PS4 port of Call of Duty: Black Ops 3 (which includes a "Zombies Chronicles" menu) and change the icon and title ID to say Black Ops 2 . When installed, you simply launch BO3.
Play the classic Black Ops II experience on your PS4 hardware.
There is no magic PKG that transforms your PS4 into a native Black Ops 2 machine.