Halo Combat Evolved Mission 6: 343 Guilty Spark

343 Guilty Spark is the sixth campaign level in Halo: Combat Evolved. In the swamps near a Flood containment facility on the surface of Installation 04, John-117 is dropped from Echo 419 to search for Captain Jacob Keyes who has been out of contact for over 12 hours. Soon, the Master Chief stumbles upon a structure and ventures within it, only to find out that the Marines accompanying the Captain have been slaughtered by an unknown force. After realizing the fate of the Marines, John fights his way out to the swamp and encounters a questionable ally. ‪@Halo‬