Set nearly three decades after the original Halo Wars, Halo Wars 2: Complete Edition follows the crew of the UNSC Spirit of Fire as they awaken from cryosleep and arrive at the mysterious Ark, only to discover it under the control of the ruthless warlord Atriox and his powerful faction, the Banished. Cut off from the rest of humanity and without reinforcements, Captain James Cutter, Professor Ellen Anders, and their allies must wage a desperate campaign against overwhelming odds. Along the way, they uncover ancient Forerunner secrets, forge uneasy alliances, and confront threats that could reshape the fate of the galaxy. As the conflict escalates, the crew's determination and ingenuity are tested in a battle where survival depends on strategy, sacrifice, and unwavering courage. The Complete Edition also includes the Awakening the Nightmare expansion, introducing a new campaign where the Banished face the terrifying return of the Flood, forcing old enemies to confront an even greater menace.