Druaga, Dragon Slayer and Hydlide were influential in Japan, where they influenced later action RPGs such as Ys, as well as The Legend of Zelda. Falcom's Dragon Slayer, created by Yoshio Kiya, is "the very first action-RPG ever made" according to GameSetWatch. Originally released for the PC-8801 computer in September 1984, it abandoned the command-based battles of earlier role-playing games in favor of real-time hack-and-slash combat that required direct input from the player, alongside puzzle-solving elements. In contrast to earlier turn-based roguelikes, Dragon Slayer was a dungeon-crawl role-playing game using real-time, action-oriented combat, combined with traditional role-playing mechanics. Dragon Slayer's overhead action role-playing formula was used in many later games. T&E Soft's Hydlide, released in December 1984, was created by Tokihiro Naito, who was influenced by The Tower of Druaga. It was the first action RPG with an overworld. The game was immensely popular in Japan, selling 2 million copies across all platforms. According to John Szczepaniak, it "cannot be overstated how influential Hydlide was on the ARPGs which followed it". The same year, Courageous Perseus was also one of the earliest action RPGs. Dragon Slayer II: Xanadu, released in 1985 (billed as a "new type of real-time role-playing game"), was an action role-playing game including many character stats and a large quest. It also incorporated a side-scrolling view during exploration and an overhead view during battle, and an early "Karma" morality system where the character's Karma meter will rise if he commits sin (killing "good" enemies), which in turn causes the temples to refuse to level him up. Xanadu Scenario II, released in 1986, was an expansion pack, created to expand the content of Dragon Slayer II: Xanadu. Hydlide II: Shine of Darkness (1985) also featured a morality system. Eurogamer cites Fairlight (1985) as an early action RPG. Late 1980s An important influence on the action RPG genre was the 1986 action-adventure The Legend of Zelda, which served as the template for many future action RPGs. In contrast to previous action RPGs, such as Dragon Slayer and Hydlide, which required the player to bump into enemies in order to attack them, The Legend of Zelda featured an attack button that animates a sword swing or projectile attack on the screen. It was also an early example of open-world, nonlinear gameplay, and introduced new features such as battery backup saving. These elements have been used in many action RPGs since.