To address your request directly: God of War: Ascension is not available for the PPSSPP emulator. PPSSPP is a dedicated emulator for the PlayStation Portable (PSP) God of War: Ascension was released exclusively for the PlayStation 3 (PS3)

If you are looking for the "best" way to experience God of War on your Android phone using the PPSSPP emulator

Here is the hard truth you need to know before we dive deep: