Adventure game
An adventure game is a video game in which the player assumes the role of a protagonist in an interactive story driven by exploration and puzzle-solving. The genre's focus on story allows it to draw heavily from other narrative-based media, literature and film, encompassing a wide variety of literary genres. Many adventure games (text and graphic) are designed for a single player, since this emphasis on story and character makes multi-player design difficult. "Colossal Cave Adventure" is identified as the first such adventure game, first released in 1976, while other notable adventure game series include "Zork", "King's Quest", "The Secret of Monkey Island", and "Myst".
OXO
Douglas used the EDSAC to simulate a game of noughts and crosses, and display the state of the game on the screen. Like other early video games, after serving Douglas's purpose, the game was discarded. Douglas did not give the game a name beyond "noughts and crosses"; the name "OXO" first appeared as the name of the simulation file created by computer historian Martin Campbell-Kelly while creating a simulation of the EDSAC several decades later. Around the same time that "OXO" was completed, Christopher Strachey expanded a draughts program he had originally written in 1951 and ported it to the Ferranti Mark 1, which showed the state of the game on a CRT display. "OXO" and Strachey's draughts program are the earliest known games to display visuals on an electronic screen, though it is unclear which of the two games was displayed first. As it ran on a computing device and used a graphical display, "OXO" is considered under some definitions to be a contender for the first video game, though under others it does not due to its lack of moving graphics or graphics which update continuously.