The hull is breached, air is slowly leaking from your crippled vessel and the weapons systems are down. Your ship's mission could end 15 years of interstellar war, but as the only remaining crewman, your first goal is survival! Your adventure takes you from the bridge of the battlecruiser USS Lexington to the surface of the stark and deadly planet of Persephone. In this alien landscape you open a crystalline portal to another time and are faced with a terrible choice and the ultimate question...What does it mean to be human? Source: The Publisher Website. In Mission Critical, you play the sole survivor of the USS Lexington and USS Jericho, a pair of starships sent by the Alliance of Free States that are ambushed on a secret scientific mission to Deneb Kaitos. Source: Wikipedia, "Mission Critical (video game)", available under the CC-BY-SA License.