November 21, 1990; Nintendo's initial shipment of 300,000 units sold out within hours. Despite stiff competition from the Mega Drive/Genesis console, the Super NES eventually took the top selling position, selling 49.10 million units worldwide, and would remain popular well into the fifth generation of consoles. Nintendo's market position was defined by their machine's increased video and sound capabilities, as well as exclusive first-party franchise titles such as Super Mario World, The Legend of Zelda: A Link to the Past and Super Metroid. In the early 1990s, the arcades experienced a major resurgence with the 1991 release of Capcom's Street Fighter II, which popularized competitive fighting games and revived the arcade industry to a level of popularity not seen since the days of Pac-Man, setting off a renaissance for the arcade game industry in the early 1990s. Its success led to a wave of other popular games which mostly were in the fighting genre, such as Fatal Fury: King of Fighters (1992) by SNK, Virtua Fighter (1993) by SEGA, and The King of Fighters (1994–2005) by SNK. In 1993, Electronic Games noted that when "historians look back at the world of coin-op during the early 1990s, one of the defining highlights of the video game art form will undoubtedly focus on fighting/martial arts themes" which it described as "the backbone of the industry" at the time. A new type of shoot 'em up emerged in the early 1990s: variously termed "bullet hell", "manic shooters", "maniac shooters" and , these games required the player to dodge overwhelming numbers of enemy projectiles and called for still more consistent reactions from players. Bullet hell games arose from the need for 2D shoot 'em up developers to compete with the emerging popularity of 3D games: huge numbers of missiles on screen were intended to impress players. Toaplan's Batsugun (1993) provided the prototypical template for this new breed, with Cave (formed by former employees of Toaplan, including Batsugun's main creator Tsuneki Ikeda, after the latter company collapsed) inventing the type proper with 1995's DonPachi. Bullet hell games marked another point where the shoot 'em up genre began to cater to more dedicated players. Games such as Gradius had been more difficult than Space Invaders or Xevious, but bullet hell games were yet more inward-looking and aimed at dedicated fans of the genre looking for greater challenges. While shooter games featuring protagonists on foot largely moved