PPSSPP is by far the best of the PSP emulators. Of all the emulators we tested, PPSSPP was the easiest to use, had the best compatibility, and the best performance. We wouldn't blame you if you thought we were advertising here but we're really not. PPSSPP gets frequent updates, has a paid version that removes ads, and it's the one that most other developers copycat from. We highly recommend that you try this one first. The ad-supported free version works fine if you want to test it out. The $5.99 price removes ads.