engine (GameMaker Studio) did not natively support PSP exports, the community utilized two primary methods to bring the game to the handheld: The GameMaker-to-PSP Wrapper:
"Thanks for the ride," Flowey whispered through the tiny speakers. "It's much more private in here." Undertale Psp Iso Download REPACK
Since the PS Vita can play PSP digital titles, many users mistakenly believe the PSP can play Vita games. It cannot. engine (GameMaker Studio) did not natively support PSP
You get the full Undertale game on your PSP, but it requires a PC running nearby. No “REPACK ISO” needed. several legitimate options are available:
If you're interested in playing Undertale, several legitimate options are available: