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A text game or text-based game is an electronic game that uses a text-based user interface, that is, the user interface employs a set of encodable characters, such as ASCII, instead of bitmap or vector graphics.
All text-based games have been well documented since at least the 1960s, when teleprinters were interlaced with mainframe computers as a form of input, where the output was printed on paper. With that, notable titles were developed for those computers using the sprinter in the 1960s and 1970s and more numerous game titles have been developed for other video terminals since at least the mid-1970s, having reached their peak popularity in that decade and the 1980s, and continued as early online games into the mid-1990s.
Although generally replaced in favor of video games that use non-textual graphics, text-based games continue to be written by independent developers. They have been the basis of instigating genres of video gaming, especially adventure and role-playing video games.