"End Game" is the seventeenth episode of the second season of the American science fiction television series The X-Files. It premiered on the Fox network on February 17, 1995. It was directed by Rob Bowman, and written by Frank Spotnitz. "End Game" featured guest appearances by Megan Leitch, Peter Donat, Brian Thompson and saw Steven Williams reprise his role as X. The episode helped explore the series' overarching mythology. "End Game" earned a Nielsen household rating of 11.2, being watched by 10.7 million households in its initial broadcast. It received positive reviews from critics.

The second season of the science fiction television series The X-Files commenced airing on the Fox network in the United States on September 16, 1994, concluded on the same channel on May 19, 1995, after airing all 25 episodes. The series follows Federal Bureau of Investigation special agents Fox Mulder and Dana Scully, portrayed by David Duchovny and Gillian Anderson respectively, who investigate paranormal or supernatural cases, known as X-Files by the FBI.