While never received an official release for the PSP, the "Undertale PSP ISO Download" usually refers to fan-made homebrew ports. Users from communities like Reddit's r/PSP have highlighted several attempts to bring the game to the handheld, but these "repacks" come with significant caveats. Port Performance and Content
Always download homebrew from established community hubs like
: A beta phase project using Game Maker and the Choby GM compiler, showing the tutorial area with functional menus and saving. Why a Full ISO is Highly Unlikely
: Undertale is officially available on PlayStation 4, PlayStation Vita, Nintendo Switch, and Xbox One. If you own a PS Vita, you can play the official version natively through the PlayStation Store .