Some modders have replaced textures in Ghost of Sparta with those ripped from GoW3 —including the health bar style, menu UI, and even a playable Blade of Olympus. Search for “Ghost of Sparta GoW3 Mod PPSSPP” on forums like GBAtemp or PPSSPP Discord. This is the closest you’ll get to a “highly compressed fixed God of War 3 PPSSPP” file.
Kratos approves this guide.