Realm of impossibility is a one or two player arcade adventure where the object of the game is to enter thirteen different dungeons and recover the items that are found therein. The front end of the program presents a menu when it has loaded and once the one or two player option and level of difficulty (1-4) has been selected, it's time to move to the dungeon selection screen. The thirteen dungeons are presented in a menu and when you begin play some of them are 'locked' items from other dungeons have to be collected before you can enter them.
Select a dungeon, load it from tape and the quest can begin. The playing areas are presented in a scrolling 3D format and each occupies several screens. As can be expected the dungeons are far from empty, and a variety of unpleasant creatures live inside them including zombies, snakes, spiders and terrifying deadly balls all of which home in on your poor man. If one of these touches the character then a certain amount of energy is taken off his energy counter at the foot of screen. You only have one life to play with, so care has to be taken to avoid contact with the denizens of the dungeons wherever possible and energy restoring objects can be collected to boost flagging spirits.
Exploring the dungeons is rewarding: useful items such as spells with which to confound the attacking nasties, and food, can be collected by running over them. Magic available includes Freeze, Protect and Confuse spells.
Some of the mazes have multi levels which are connected by ladders. Later levels have some very weird Esther-like constructions which look only a few metres high on one side, but drop hundreds of feet on the other, which can lead to an early death for the unwary adventurer. Once all the useful items in the current dungeon have been collected the player must work travel back to the starting location where a points bonus is given and the dungeon title screen displayed again. The quest can then be continued into another of the thirteen regions.