The Dion Crisis is the final game in the Mercenary-series. This time it's not the planet Eris that is in centre of the storyline, but Dion. This time the Gamma solarsystem are populated in graphics, by people and vehicles. A small amount of interaction with other characters is possible. The game takes place in 15 January 2101. And the aim is to stop an evil politician, P.C. Bil, from being elected as president. There is six ways to complete the game.