Mission Critical is a first-person adventure game with emphasis on exploration and puzzle solving.

The year is 2134, fifty years into the brutal civil war between the Alliance and the anti-technology UN, and the UN is gaining the upper hand due to its larger numbers. The Alliance is desperate. You are an agent of the Alliance on starship USS Lexington, bound for the planet Peresphone to investigate a powerful alien artifact that was recently discovered by Alliance scientists. The artifact could change the course of the war, but UN spies are everywhere and will do whatever it takes to get there first.