Highly compressed games can sometimes experience stuttering or audio lag if the emulator settings are not optimized. Use these settings to maximize your device's performance: Graphics Settings
While PPSSPP is the undisputed king for PSP emulation, it's worth knowing the alternatives.
To play on an Android device, you generally need a PS2 emulator (like AetherSX2 or NetherSX2), as the game was originally released for the PlayStation 2. While the PPSSPP emulator is specifically for PlayStation Portable (PSP) games, it cannot natively run the PS2 version of God of War II . Emulator Options for God of War on Android
Scaled rendering resolutions remove the jagged edges of the original 2007 release, delivering crisp visuals on modern AMOLED and LCD smartphone screens.
While the Blades of Athena are your bread and butter, upgrades to the Typhon's Bane and Cronos's Rage will make crowd control significantly easier.
If your phone meets these requirements, you are ready to proceed.