The printer language which is a full-fledged programming language, and sometimes abused because of it.
Puzzles
MIT Mystery Hunt 2002 Block Party
MIT Mystery Hunt 2002 Grape Clusterbomb
MIT Mystery Hunt 2002 Tax Puzzle
MIT Mystery Hunt 2002 Choice Hotels (Cyan Meta)
MIT Mystery Hunt 2003 A Problem with Printing
MIT Mystery Hunt 2014 Glazing Over
MIT Mystery Hunt 2022 What's in the Box? What's in the Box?!
Categories