PPSSPP, an app that's capable of emulating PSP games, has joined the growing number of retro game emulators on the iOS App Store. The program has been around for almost 12 years, but prior to this, you could only install it on your device through workarounds. «Thanks to Apple for relaxing their policies, allowing retro games console emulators on the store,» its developer Henrik Rydgård wrote in his announcement. If you'll recall, Apple updated its developer guidelines in early April, and since then, the company has approved an app that can emulate Game Boy and DS games and another that can play PS1 titles.