X-Men Age of Apocalypse Reading Order
The 1995 crossover storyline Age of Apocalypse was one of the most ambitious crossover events in X-Men history. Much like The Clone Saga in the Spider-Man titles, this story became an era-defining milestone within the broader Marvel Universe.
Unlike traditional crossover events, which build upon existing continuity, the Age of Apocalypse storyline temporarily replaced the main X-Men titles with entirely new series set in an alternate universe. These included X-Calibre, Gambit and the X-Ternals, Generation Next, Astonishing X-Men, Amazing X-Men, Weapon X, Factor X, X-Man and X-Universe. Each of these limited series explored different aspects of a dystopian timeline dominated by the ancient mutant Apocalypse, offering radically altered reimaginings of familiar characters and dynamics.
The story kicks off when Legion (David Haller), the mentally unstable son of Professor Charles Xavier, travels back in time intending to assassinate Magneto in the hope of preventing the ideological conflict that would later erupt between Magneto and Xavier. However, Legion’s mission ends in tragedy when he inadvertently kills Xavier instead. This assassination fractures the timeline, giving rise to an alternate reality in which Apocalypse begins his conquest of Earth a decade earlier than in the original continuity.