over pure action. Notable games of the period include the tactical combat game Star Trek (1971) by Mike Mayfield, the hide-and-seek game Hunt the Wumpus (1972) by Gregory Yob, and the strategic war game Empire (1977) by Walter Bright. Perhaps the most significant game of the period was Colossal Cave Adventure (or simply Adventure), created in 1976 by Will Crowther by combining his passion for caving with concepts from the newly released tabletop role-playing game (RPG) Dungeons and Dragons (D&D). Expanded by Don Woods in 1977 with an emphasis on the high fantasy of J.R.R. Tolkien, Adventure established a new genre based around exploration and inventory-based puzzle solving that made the transition to personal computers in the late 1970s. While most games were created on hardware of limited graphic ability, one computer able to host more impressive games was the PLATO system developed at the University of Illinois. Intended as an educational computer, the system connected hundreds of users all over the United States via remote terminals that featured high-quality plasma displays and allowed users to interact with each other in real time. This allowed the system to host an impressive array of graphical and/or multiplayer games, including some of the earliest known computer RPGs, which were primarily derived, like Adventure, from D&D, but unlike that game placed a greater emphasis on combat and character progression than puzzle solving. Starting with top-down dungeon crawls like The Dungeon (1975) and The Game of Dungeons (1975), more commonly referred to today by their filenames, pedit5 and dnd, PLATO RPGs soon transitioned to a first-person perspective with games like Moria (1975), Oubliette (1977), and Avatar (1979), which often allowed multiple players to join forces to battle monsters and complete quests together. Like Adventure, these games ultimately inspired some of the earliest personal computer games. The first arcade video games and home consoles The modern video game industry grew out of the concurrent development of the first arcade video game and the first home video game console in the early 1970s in the United States. The arcade video game industry grew out of the pre-existing arcade game industry, which was previously dominated by electro-mechanical games (EM games). Following the arrival of Sega's EM game Periscope (1966), the arcade industry was experiencing a "technological renaissance" driven by "audio-visual" EM novelty games, establishing the arcades as a healthy environment for the introduction of commercial video games