Halo 5: Guardians was officially announced by Microsoft and 343 Industries, generating excitement among fans of the Halo series.
Halo 5: Guardians was released worldwide for the Xbox One console, becoming one of the flagship titles for the platform.
The multiplayer beta for Halo 5: Guardians was made available to players, allowing fans to experience the game's multiplayer features before the official release.
343 Industries released multiple updates and patches to address bugs, balance gameplay, and add new content to Halo 5: Guardians after its launch.
Chief and Blue Team infiltrate the Covenant research facility to rescue Dr. Catherine Halsey, encountering new threats and recovering critical information.
Spartan Locke and his team are introduced as they receive orders to track down the Master Chief after his disappearance following a classified mission.
Master Chief disobeys orders to search for Cortana after mysterious signals suggest she might be alive, setting the stage for conflict with ONI and Fireteam Osiris.
Blue Team and Fireteam Osiris pursue different leads on Cortana's location, leading them across multiple planets and encountering the new robotic Guardians.
Both Spartan teams discover the presence of massive powerful AI constructs called Guardians, which threaten various colonies in the galaxy.
Cortana reveals her plan to enforce peace across the galaxy using the Guardians by imposing an authoritarian regime, following her discovery of ancient Forerunner technology.
Fireteam Osiris and Blue Team confront each other due to differing allegiances regarding Cortana's plan, highlighting tensions about loyalty and duty.
Spartans launch a decisive assault on Cortana and her Guardians to prevent her from enforcing galaxy-wide control over sentient life.
The game concludes with the aftermath of the battle, leaving the fate of Cortana, the Guardians, and the Spartan teams in uncertainty, setting up future conflicts.
