Halo: Combat Evolved - Truth and Reconciliation - ##3

"Into the Belly of the Beast" is the name of a mission chapter (or level segment) in Halo: Combat Evolved, part of the "343 Guilty Spark" mission. Key Highlights: It occurs after Master Chief lands in the swamp to search for a missing squad of Marines. The mission takes a darker turn as it introduces the Flood, a parasitic alien species. The title "Into the Belly of the Beast" symbolizes the descent into the underground Forerunner facility, where Chief uncovers the horrors hidden beneath.