the rest of the world, was a collaborative effort between Hudson Soft, who created video game software, and NEC, a major company which was dominant in the Japanese personal computer market with their PC-88 and PC-98 platforms. R-Type, an acclaimed side-scrolling shoot 'em up, was released in 1987 by Irem, employing slower paced scrolling than usual, with difficult levels calling for methodical strategies. 1990's Raiden was the beginning of another acclaimed and enduring series to emerge from this period. In 1987, Square's 3-D WorldRunner was an early stereoscopic 3-D shooter played from a third-person perspective, followed later that year by its sequel JJ, and the following year by Space Harrier 3-D which used the SegaScope 3-D shutter glasses. Also in 1987, Konami created Contra as a coin-op arcade game that was particularly acclaimed for its multi-directional aiming and two player cooperative gameplay. Digital Devil Story: Megami Tensei by Atlus for the Nintendo Famicom abandoned the common medieval fantasy setting and sword and sorcery theme in favour of a modern science-fiction setting and horror theme. It also introduced the monster-catching mechanic with its demon-summoning system, which allowed the player to recruit enemies into their party, through a conversation system that gives the player a choice of whether to kill or spare an enemy and allows them to engage any opponent in conversation. Sega's original Phantasy Star for the Master System combined sci-fi & fantasy setting that set it apart from the D&D staple. It was also one of the first games to feature a female protagonist and animated monster encounters, and allowed inter-planetary travel between three planets. Another 1987 title Miracle Warriors: Seal of the Dark Lord was a third-person RPG that featured a wide open world and a mini-map on the corner of the screen. According to Wizardry developer Roe R. Adams, early action-adventure games "were basically arcade games done in a fantasy setting," citing Castlevania (1986) and Trojan (1986) as examples. IGN UK argues that The Legend of Zelda (1986) "helped to establish a new subgenre of action-adventure", becoming a success due to how it combined elements from different genres to create a compelling hybrid, including exploration, adventure-style inventory puzzles, an action component, a monetary system, and simplified RPG-style level building without the experience points. The Legend of Zelda was the most prolific action-adventure game series through to the 2000s. The first Nintendo Space World show was held on