The first game in the Halo series, Halo: Combat Evolved, was released for the Xbox, marking the beginning of the iconic franchise.
Halo 3 was released as the conclusion to the original Halo trilogy on the Xbox 360 platform.
Microsoft announced Halo: The Master Chief Collection, a compilation of several Halo titles remastered for the Xbox One.
Halo: The Master Chief Collection was officially released, consolidating multiple Halo games into one package.
The Master Chief Collection was launched on PC through Steam and Microsoft Store, making the series accessible to a new platform.
Humanity first encounters the Covenant, a collective of alien species, marking the beginning of the Human-Covenant War.
The UNSC discovers Halo Installation 04, a massive ringworld with unknown purpose, leading to critical events.
Master Chief destroys Halo Installation 04 to prevent it from being used by the Covenant and the Flood.
Master Chief fights on Installation 05 (Delta Halo) to stop the Covenant and contain the Flood outbreak.
Master Chief and allies fight the Flood infestation on the Ark (also called Installation 00) to prevent galactic destruction.
