Kill the Prez
Kill the Prez was a fictional computer game, seemingly for the Amiga computer platform, invented by the British home computer magazine Amiga Power.
According to the magazine, the game is a graphical adventure game where you play an assassin, with the object of [...] United States President John F. Kennedy. The magazine published several screenshots of the game, which were easily identifiable as crude mock-ups done with a desktop publishing program. Despite this, the magazine insisted the game was real, and even provided hints for completing it.
A real game called JFK: Reloaded was released in 2004 by a Scottish computer game company, also with The Assassination of John F. Kennedy being the main objective. This, however, was a shooter/simulation game, rather than an adventure game.