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In page Quake (video game):

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As an example of the dedication that Quake has inspired in its fan community, a group of expert players recorded speedrun demos (replayable recordings of the player's movement) of Quake levels completed in record time on the "Nightmare" skill level. The footage was edited into a continuous 19 minutes, 49 seconds demo called Quake done Quick and released on June 10, 1997. Owners of Quake could replay this demo in the game engine, watching the run unfold as if they were playing it themselves.[citation needed]