runs from the battle..). Once all events have resolved, the Tower is rotated to the next player and their turn begins. Each territory besides a player's own contains one of three keys—bronze, silver and gold, in that order—needed to unlock the Tower. The location of the key is randomly determined by the Tower. Each player will therefore need to travel around the board, through each of the other three players' territories, until the player has all three keys. At this point, the player returns to their territory, buys reinforcements for a maximum complement of warriors, and then attempts to unlock the tower with a key code which once cracked brings them to the final battle to defeat the Tower, which contains a predetermined number of defenders inside. The first player to beat the Tower wins the game; losing requires building up another army. Rarity Working copies of Dark Tower are increasingly difficult to find and thus highly sought after by collectors. This is primarily due to two things: (1) wear and tear on the tower unit, which tended to experience technical faults with the light bulbs and carousel after prolonged use, and (2) the fact that the game went out of print shortly after release due to a lawsuit brought against Milton Bradley for intellectual property theft. Litigation Dark Tower was the subject of trade secret litigation in 1985. Two independent game developers named Robert Burton and Allen Coleman submitted a game to Milton Bradley titled "Triumph" that involved an electronic tower as the centerpiece. Milton Bradley rejected the game, but proceeded to release Dark Tower some time later. The inventors sued for misappropriation of trade secrets and won a jury verdict for over $700,000. The trial judge, however, vacated the jury's judgement. Despite finding that Milton Bradley had likely "plagiarized the plaintiffs' idea without so much as a by-your-leave" the judge proceeded to issue a directed verdict for the defendant because Burton and Coleman had signed a contract waiving any contractual relationship (which arguably included any duty of confidentiality). The First Circuit Court of Appeals reversed, finding evidence that Milton Bradley entered an implied agreement to keep the game confidential and reinstated the damage award. Reception Games magazine included Dark Tower in their "Top 100 Games of 1981", noting especially how the "tower itself swivels so that each player alone views what happens to his own band of warriors".