What platforms is Undertale Promise available on?

Undertale Promise is available on PC (Microsoft Windows).

Who developed Undertale Promise?

Undertale Promise was developed by PointyPotatoPuff.

Undertale Promise

About

Undertale Promise is a fan-made prequel to Undertale Yellow, a fan-made prequel to Toby Fox's UNDERTALE. Follow Harmony through Snowdin to find her lost friend while evading the royal guard. Meet familiar faces and make new friends in this friendly RPG where somebody has to die. Can you avert the tragedy waiting to happen?