Set to 2x PSP for a balance between clarity and performance.
Play a full career mode or a quick Hell in a Cell match anywhere.
Set to Vulkan (if your phone supports it) or OpenGL. Frameskipping: Set to 1 if the game runs slowly.
Open the PPSSPP app, navigate to the folder where you extracted the ISO, and tap on the WWE 2K15 icon to start the match. Best Settings for Smooth Gameplay