There is an official Undertale port for Android (mobile phones). Some users hoped to run this via an Android emulator on PSP—but PSP’s OS (no Android support) makes this impossible.
Undertale (by Toby Fox) was released for: undertale psp iso download top
If you have a custom firmware (CFW) PSP and a home Wi-Fi network, you can stream Undertale from your PC to your PSP using a homebrew app like or Moonlight PSP (experimental). There is an official Undertale port for Android
. The game was built in GameMaker Studio, an engine that does not natively support the original PSP hardware. Why Is There No Full Port
: A long-standing project that aimed to bring a lighter version of the game to the PSP, though it is frequently cited as being in a state of "perpetual development" with no final release. Why Is There No Full Port? Creating a 1:1 port of