Note: Standard PPSSPP will not run a raw PS2 ISO. You need a specially repacked version.

In Settings, enable "Skip Buffer Effects" and set "Frame Skipping" to 1 if you experience lag.

If you see files claiming to be a "highly compressed" version of God of War 2

God Of War 2 Highly Compressed For Android Ppsspp -extra ((free)) Access

Note: Standard PPSSPP will not run a raw PS2 ISO. You need a specially repacked version.

In Settings, enable "Skip Buffer Effects" and set "Frame Skipping" to 1 if you experience lag. God Of War 2 Highly Compressed For Android Ppsspp -Extra

If you see files claiming to be a "highly compressed" version of God of War 2 Note: Standard PPSSPP will not run a raw PS2 ISO