 Yet such a solution was entirely within the spirit of the game, as its clues sometimes broke the fourth wall with an acknowledgement that a computer game was being played.The solution to the game was to enter a special string in the Caretaker's Residence, which would display a "plug" that the player could pull out, although doing so required use of the built-in screen editing keys.In later versions of the game, a minimum number of points had to be scored before this would work; points are scored by completing tasks and by certain actions that display free will (for example, most failed attempts to escape score points even if they do not work)

In 1982, Edu-Ware released a second version of the game, entitled, "Prisoner 2", with color and improved graphics (all high-resolution), which replaced the original's top-down perspective with a first-person view.