Email technical support. Please keep in mind that all e-mails will be answered by Fangamer.

Include the following:

A description of the problem, what you see on screen,

and what happened shortly before you encountered it

Your operating system (Windows 7/8/10, macOS, Linux, etc.)

Where you purchased the game from (Steam, Humble Bundle, etc.)

... and send your email to:

undertale@fangamer.com