A small demo was created for a homebrew jam in late 2023, showcasing basic mechanics but serving more as a technical proof-of-concept than a playable game. How to Play "Ports" on Your PSP
To run these fan projects, your PSP must be running like 6.60 or 6.61 PRO/ME. Once modified, you generally don't use an ISO; instead, you use EBOOT.PBP files. undertale psp iso download exclusive