Zork Zero: The Revenge of Megaboz

69,105

Infocom's famous 69,105 number is referred to in the line "This zoo, with 69,105 cages, is easily the largest in Quendor."

Encyclopedia Frobozzica

One of the more interesting in-game elements of Zork Zero is the "Encyclopedia Frobozzica" -- a thorough reference work of almost all things related to the GUE (Great Underground Empire, or the world of Zork). One could literally spend hours looking up entries -- try all the old references from the old Zorks and see what you can learn. A lot even have pictures!