Mission 15: Guardians
Guardians is the finale of Halo 5, shifting focus back to Fireteam Osiris as they fight to rescue Blue Team from Cortana’s control and stop the Cryptum from leaving Genesis. My work as a mission focused on elevating existing encounters and level design of key spaces along with implementing the final set piece.
The mission begins with Osiris following Exuberant Witness toward the Cryptum facility, where Blue Team is being prepared for slipspace travel. Cortana’s larger plan is already in motion, the Guardians have begun mobilizing, and the player is asked to act quickly before the Cryptum is taken beyond reach.
Structurally, the mission moves through three major beats: a large exterior assault to break the Cryptum’s gravitational anchors, a high-pressure interior defense while Exuberant regains control of the facility, and a final set piece where Fireteam Osiris free Blue team.
The challenge of this mission was to provide an almost second ending to the game's dual story. We wanted to provide heavy variety from the last mission and meaningful actions to Fireteam Osiris without negating or repeating the accomplishments and gameplay of Blue team’s final mission.
Overview
Encounter Highlights
The Cryptum Approach encounter was designed as a wide-linear combat sequence that mirrors the Blue Team finale while changing the player fantasy. Where Blue Team’s final mission leaned into traditional combat against newer Promethean threats, this section uses more familiar Covenant enemies inside broader spaces built to highlight the spartan traversal abilities.
The encounter begins with Exuberant guiding the player toward the Cryptum as the Reclamation unfolds around them. The design goal was to create a sense of urgency and forward pull, using sloped progression, elevated platforms, and the distant Cryptum as a constant landmark. Players are always moving toward the Guardian-scale objective, but the wide linear design give them options to use verticality and flank routes and power positions to navigate each part of the multi room encounter.
Combat is structured around an open three-stage fallback, with enemies already entrenched across the fighting space. The goal here was to create an environment that had enough variety in options and opportunity to create memorable sandbox moments in an on foot encounter setting.
The strength of the encounter is how it combines a wide variety of player tools, enemy variety and level design opportunities to create an enjoyable sandbox brawl as Osiris races toward the Cryptum.
Cryptum Approach
The Cryptum Facility fight shifts the mission from exterior vehicle combat into a focused, high-friction interior defense encounter.
The encounter was built around escalating waves, squad survival, resource management, and rotating positional defense, asking players to apply everything they had learned in one final last-stand scenario. The arena’s grav cannons are key to the structure of the fight, allowing players to rapidly reposition as the battle ebbs and flows, access power weapons, establish overwatch angles, and escape mounting enemy pressure.
Because the encounter grows increasingly chaotic, the multi-layered arena needed to provide clear, readable opportunities under stress. Players had to understand where to hold, when to rotate, when to push for resources, and how to use vertical movement to survive as the defense escalated.
Cryptum Arena
The final Reclamation set piece shifts away from traditional combat and focuses on urgency, physicality, and spectacle. With Cortana’s Guardian preparing to enter slipspace and take the Cryptum with it, the player must push up the ramp toward the relay device while massive Guardian shockwaves interrupt movement and separate Fireteam Osiris one pulse at a time.
The design goal was to create a final playable beat that felt desperate and cinematic without fully taking control away from the player. I wanted to create a momentum-driven sequence asking the player to push forward under escalating pressure and complete the final action that allows Exuberant to regain control.
The primary challenge was technical execution. Our animation and mission scripting systems were not built to cleanly support the kind of state-dependent handoff this moment required, and production constraints did not allow for a full systemic solution. I developed a mission-specific scripting approach that allowed unique animation beats to blend with gameplay based on each player’s state and location, while preserving the feeling that players were still in control.
The result was a co-op playable cinematic sequence that delivered the intended emotional and physical payoff: Osiris fighting through the Guardian’s final pulses, Locke reaching the relay, and the player completing the action that saves Blue Team.
Reclamation
