Play PS2 Games (.iso) on PS4 (5.05)

The PlayStation 4 has some built-in software components to play PS2 games via emulation; users on firmware 5.05 are able to leverage this functionality to convert PS2 .iso disc images to .pkg files that can be installed onto your PS4 via the Package Installer (HEN). This guide will show you how to create PS2 Classics and install them onto your PS4. The PS4 uses software-based emulation to play PS2 Classics so this method is not 100%
compatible with every single game:

PS2 Classics Emulator Compatibility list

Required Downloads:

PS4 PS2 Classics GUI

Requirements

PlayStation 4 on Firmware 5.05

Firmware 5.05 is required to access the HEN web exploit and install .pkg games
PS4’s on lower firmware should update manually via USB storage
There is currently no known way to downgrade your PS4 firmware
Old PS4 Bundles released before 2018 can be found with their base firmware 5.05 or below

5.05 HEN Exploit

You must have the HEN exploit active to access the Package Installer in [★Debug Settings]
The HEN exploit requires a PS4 on 5.05 firmware

Windows PC

A PC is required to run the PS4 PS2 Classics GUI application

USB Storage Device

A USB Storage device is required to install .pkg games using the Package Installer

Create PS2 Package File (.pkg)

Exctract the .zip then launch PS4 PS2 Classics GUI
Select [No] -> [No] -> [OK]
Select the PS2 .iso file
Enter the Title ID for the PS2 game if it does not appear automatically
Enter the Title of the PS2 game if it does not appear automatically
Right click the image on the left and select [Change Background] to select your background image file
Right click the image on the left and select [Change Icon] to select the Home menu icon image for the game
Select [Create PS2 Classic] and choose the location you wish to save the file to
Wait for the process to complete

Installing PS2 Game

Transfer your newly created PS2 Classics .pkg to the root of your USB storage device
Insert your USB storage device into your PS4 and power it on
Go to [Settings] -> [User’s Guide / Helpful Info] -> [User’s Guide] to launch the web exploit page
You will need to change your DNS settings to access the web exploit page via the [User’s Guide].
Select [PS4] -> [HEN]
Press the [PS] button to go back to the Home Screen once the process is complete
Go to [Settings] -> [★Debug Settings] -> [Game] -> [Package Installer]
Select the PS2 .pkg that you wish to install and wait for the process to complete
Press the PS button to find your new PS2 Classic in the home screen