The Halo series consists of several first-person shooter games set in a science fiction universe. Here's a summary of the main games from Halo: Combat Evolved (CE) to Halo: Reach:
Each game in the series contributes to the overarching narrative, building upon the conflict between humanity and the Covenant, and the discovery of ancient and powerful technologies like the Halo rings. The games also introduce various characters and expand the lore of the Halo universe.
Halo: Combat Evolved (2001)
Halo 2 (2004)
Halo 3 (2007)
Halo 3: ODST (2009)
Halo: Reach (2010)