Pimania (1982) was an early interactive fiction game released by Automata. Versions were published for the ZX81, Spectrum, Dragon, BBC Micro, and possibly other home computers. The first player to solve the game's various clues -- and attend the correct location in the UK at the correct date and time -- was awarded the real-life prize of a golden sundial worth thousands of pounds.
Navigation between locations was done by number rather than direction; taking these numbers as positions on a clock face and drawing the resulting room layout yielded the shape of a horse, one of the clues to the secret prize location.
The Pi-Man, the quirky hero of Pimania, went on to become a stock character and appeared in numerous other games by Automata, though these sequels were assorted action games rather than interactive fiction.