a robot that continually generated Enforcers, rather than have them already on the screen like other enemies. Brains were conceived as robots that could capture humans and brainwash them into enemies called Progs, and also launch cruise missiles that chase the player in a random zigzag pattern, making them difficult to shoot down. DeMar devised the final enemies as a way to further increase the game's difficulty; Tanks that fire projectiles which bounce around the screen, and Quarks as a tank-producing robot. In the summer of 2012, Eugene Jarvis wrote a comprehensive evaluation of the Robotron Enemy Dynamics: The game is hard-coded with 40 waves, whereupon the game repeats wave 21 to 40 over and over until the game restarts back to the original wave 1, once the player completes wave 255. In the same year, Larry DeMar provided details on how to trigger the secret copyright message in Robotron. Ports Atari, Inc. ported Robotron: 2084 to its own systems (the Atari 8-bit family of home computers, Atari 5200, and Atari 7800), while it released the game for the Apple II, Commodore 64, VIC-20, TI-99/4A, and IBM PC compatibles under its Atarisoft label. Most early conversions did not have a dual joystick and were received less favorably by critics. Atari Corporation published a Lynx port in 1991. Reception Williams sold approximately 19,000 arcade cabinets; mini cabinets and cocktail versions were later produced. In 1995, Flux magazine ranked the arcade version 52nd on their Top 100 Video Games. In 1996, Next Generation listed the arcade and PlayStation versions as number 63 on their "Top 100 Games of All Time", citing the game's relentless peril. In 1999, Next Generation listed Robotron as number 21 on their "Top 50 Games of All Time", commenting that, "the bottom line is that the tension and challenge of Robotron has yet to be bested. This may be the most intense interactive entertainment experience ever created". Retro Gamer rated the game number two on their list of "Top 25 Arcade Games", citing its simple and addictive design. In 2008, Guinness World Records listed it as the number eleven arcade game in technical, creative and cultural impact. Critics lauded Robotron: 2084s gameplay. Authors Rusel DeMaria and Johnny Wilson enjoyed the excitement created by the constant waves of robots and fear of the character dying. They called it one of the more impressive games produced from the 80s and