Halo: Combat Evolved was developed by
Bungie as a
launch game for
Microsoft's debut video game console, the
Xbox in November 2001, establishing the
Halo franchise as a tentpole first-party series for the platform. After Bungie gained independence in 2007, Microsoft, which retained the rights to the
Halo property, assembled 343 Industries as a first-party studio that would continue the franchise after the former fulfilled their existing contractual commitments, debuting with a remaster titled
Halo: Combat Evolved Anniversary (2011) before ultimately overseeing the "
Reclaimer Saga" arc of the series from
Halo 4 (2012) to
Halo Infinite (2021). In October 2024, 343 Industries announced their formal rebranding as
Halo Studios, intentionally done as a way to signal a fundamental change in the development team's internal philosophy, and to provide a clean break between eras of the franchise as previously done with transitioning between Bungie and 343. Halo Studios simultaneously announced that multiple future games were in various stages of production, and that they were all set to be developed on the third-party
Unreal Engine 5 as opposed to the proprietary Slipspace Engine technology they had created for
Infinite. Art director Chris Matthews cited Unreal's respective lighting and rendering technologies, Lumen and Nanite, as presenting opportunities for more interactable objects and player experiences, motivating the engine change. Studio head Pierre Hintze, who succeeded former 343 Industries lead and founder
Bonnie Ross before the transition, described the rebrand as evocative of their intent to "change the recipe" of how
Halo games were produced in conjunction with the pivot to a new engine. Among their new projects in Unreal Engine 5, Halo Studios initiated development on
Campaign Evolved as a means of defining a fresh starting point for new players with little knowledge of the
Halo storyline and universe, while laying the groundwork for future games in anticipation of both the franchise's 25th anniversary, and the growth in the potential addressable audience from a
PlayStation release, a historical first for
Halo after being a
platform exclusive for Xbox consoles and
Windows since inception. Game director Greg Hermann asserted that the move to Unreal also enabled the team to refocus on the implementation of gameplay and content by relying on the technical support of
Epic Games, as opposed to simultaneously managing engine and design responsibilities as they did creating Slipspace and producing
Infinite.
Design Creative director Max Szalgor stated that an aim of
Campaign Evolved is to faithfully rebuild every encounter and mission in
Combat Evolved with enhancements to fidelity. Fully remaking
Combat Evolved also allowed the developers to rectify numerous design and accessibility constraints they were unable to address when working on
Combat Evolved Anniversary in 2011, such as improved wayfinding and navigation functions during traversal, and improvements to the diversity and pacing in enemy encounters, notably citing the monotony of fighting against the parasitic
Flood in the game's seventh mission, "The Library". Community manager Brian Jarrard and executive producer Damon Conn both defended the inclusion of sprinting as a movement option, with the latter asserting that it was evocative of the degree of player choice they wished to provide in customizing gameplay. Jarrard similarly states that since its introduction in
Bungie's
Halo: Reach (2010), the ability had featured in most entries of the series, which incited different perspectives from fans about what
Halo gameplay should ideally feel like. In addition, the team sought to integrate gameplay mechanics and features first introduced in later
Halo games into
Combat Evolved, namely the ability to wield every weapon used by the
Covenant including the Energy Sword, which was not usable by the player until
Halo 2 (2004), as well being able to hijack and commandeer all of their vehicles such as the Wraith tanks. Skulls, collectible gameplay modifiers first introduced in
Halo 2 before being incorporated into
Combat Evolved Anniversary, are available in
Campaign Evolved; the game boasts 'dozens' of Skulls to procure, the highest number present in any
Halo campaign to date. As its subtitle suggests,
Campaign Evolved eschews including the original game's competitive
player versus player (PvP) multiplayer due to the development team's focus on refining the single-player campaign and expanding its respective
cooperative multiplayer options. The game still supports four-player online co-op and
cross-platform gameplay on all platforms with cross-progression, and retains the two-player local split-screen mode on consoles, which Conn hoped would uphold the sense of community prevalent in
Halo gameplay.
Presentation While
Combat Evolved Anniversary was a simple graphical update of the original game,
Campaign Evolved redoes several elements of the game's presentation, chief among them being completely new cinematics and audio that has been re-recorded with new performances from the original game's principal voice cast. Game designer Dan Gnaidy stated that the Halo Studios team reviewed the development assets they had access to from
Combat Evolved's production to map the blocking and sequencing of scenes, in addition to referencing the original game assets and storyboards produced by Bungie. The game's audio design has been revised, including the original score co-composed by
Martin O'Donnell and
Michael Salvatori being faithfully remastered. == Release ==