The game files must be placed in ux0:app/PCSE01023/ (USA version). 📂 Installation Steps
Undertale was officially released for the PlayStation Vita in 2017. To run the game using the format on a modded console, you must use the NoNpDrm plugin which bypasses digital rights management by using fake licenses. 🛠️ Setup Requirements Undertale PS VITA (USA) (NoNpDrm)
Add ux0:tai/nonpdrm.skprx (or ur0 for SD2Vita) under the *KERNEL section of your config.txt . The game files must be placed in ux0:app/PCSE01023/