Loch-Ness Monster is Game Plan's most famous pinball machine. Only one was produced with some extra backglasses and plastics made for a short production run. This was to be Game Plan's finest machine ever made with a moving three-dimensional model of the monster located underneath the playfield viewable through a blue window in the center. This was also the only Game Plan machine to feature a ramp. Unfortunately, as this machine would have been an enormous success, Game Plan closed it's doors for good before its release in 1985.