Grail to the Thief is an interactive audio adventure that can be pladyed using only sound, without the need for visuals. The game stars Hank Krang, a dirty thief from the near future who recently had a self-aware time machine called the Time Excursion Digital Interface, or TEDI, fall into his lap after a poker game. He has decided to use this technology to go throughout time, stealing priceless artifacts. On his first adventure, Grail to the Thief, Hank travels to Arthurian times in search of the Holy Grail.