Update, July 2015 — the link to the original is dead. The IFDB entry from the Hamlet text game points to a link that also seems to be dead.
Who really killed Hamlet’s dad? What does King Richard III want with a horse anyway? And where did the gravedigger get that gorgeous pink dress? Avenge your father, defeat your evil uncle and ascend the throne of Denmark in William Shakespeare’s long undiscovered text adventure. —Robin Johnson —The Most Lamentable and Excellent Text Adventure of Hamlet, Prince of Denmark (Online Residence of Robin Johnson)