Monster Hunter Portable 3rd HD VER

[TheDax]

This game runs at 30 FPS when at full speed, and 60 FPS in menus (before loading the game) and FMVs.

With that said, your device might simply be too weak (or not be PPSSPP-friendly, e.g. Snapdragon) to play the game at a decent speed, if you can't find settings that seem to help. It's a good bit more demanding than MHFU.