is an action role-playing video game developed by Atlus for the TurboGrafx-16 and originally published by Hudson Soft in Japan on March 4, 1989, and later in North America by NEC on November 15 of the same year. The first installment in the eponymous franchise, the game is set in the land of Oddesia, which has been overrun by an alien race and where players assume the role of one of eight main characters tasked with recovering the Ora stone to kill the alien king Natas. Co-directed by Kazutoshi Ueda and Yōsuke Niino, the title was created by most of the same team that would work on later several projects such as entries in the Megami Tensei series. Though it was initially launched for the TurboGrafx-16, it was later re-released through download services for various consoles. Dungeon Explorer garnered positive reception from critics during its initial release and is considered a pioneer title in the action role-playing game genre due to its co-operative multiplayer gameplay for up to five players, but has been met with a more mixed response from reviewers in recent years. It was followed by four sequels: Dungeon Explorer II (1993), Dungeon Explorer for Sega CD and Crystal Beans from Dungeon Explorer (1995), as well as Dungeon Explorer: Warriors of Ancient Arts (2007). Gameplay Dungeon Explorer is an action role-playing game with dungeon crawl and hack and slash elements that is played in a top-down perspective reminiscent of Gauntlet where players assume the role of one of the eight main characters tasked with recovering the Ora stone to ultimately kill the alien king Natas and restore peace to the land of Oddesia. Each character belongs to a class (fighter, thief, warlock, witch, bishop, elf, bard, or gnome) and their abilities vary primarily in their black and white magic as well as statistics. For example, the bishop's white potion heals nearby allies, whereas the bard's black potion has the ability to change the music. Special classes, like the princess and hermit, can also be unlocked via password as the game progresses. The players explore towns or fields to find a dungeon, which hosts a boss that must be defeated to advance and each boss leaves a crystal after their defeat, which cycles through four colors and corresponds with the character's stats (attack, strength, agility and intelligence). Players can also increase their stats by defeating enemies or finding accessories