While there are many misleading guides online, because it is a PlayStation 3 (PS3) exclusive. PPSSPP is designed strictly to emulate the PlayStation Portable (PSP) hardware and is not compatible with PS3 game files.
Switch your graphics backend from Vulkan to OpenGL, or vice versa. Ensure "Buffered Rendering" is enabled. While there are many misleading guides online, because
God of War: Ascension was developed exclusively for the PlayStation 3 (PS3) and launched in 2013. The PSP hardware—and by extension, the PPSSPP emulator—cannot natively run PS3 games. Any website or download link claiming to offer a "God of War Ascension PPSSPP ISO" is actually providing a heavily modded version (a "reskin") of an official PSP game, usually God of War: Chains of Olympus or God of War: Ghost of Sparta . Ensure "Buffered Rendering" is enabled