Halo: Campaign Evolved features a new three-mission story arc titled Operation: METEORITE, which includes Master Chief and Sgt. Johnson. The narrative takes place a year before the original game and involves a covert UNSC mission aboard a Covenant research vessel. The gameplay includes battles with UNSC forces, exploration of new locations, and encounters with new enemies like the Brute Berserker. The story was developed with sci-fi author Troy Denning. Pre-orders are available for three editions: Standard Edition (.99), Premium Edition (.99), and Collector’s Edition (9.99), each offering different bonuses. The game launches on July 28, 2026, with early access for Premium and Collector's Edition owners starting July 23. It supports cross-play and cross-progression across multiple platforms and will be available on Game Pass Ultimate and PC Game Pass.