Zumpf and Fumping is a TADS 2 interactive fiction game and was released in 2001 anonymously.
Review by David Welbourn (originally posted at Baf's Guide
A somewhat confusing story about your departure and return to your homeland, and about your confrontation and eventual battle with a Zumpf. Since this game was for a speed-IF, there probably wasn't time for the author to invent many of the details needed to support such a complicated backstory, and thus magical effects and oddly-spelt words are used to help paper over the cracks instead. It almost works.