Marvel United: X-Men – The Age of Apocalypse

The death of Professor X in a freak time-travel accident resulted in a reality in which the world is ruled by the mutant despot Apocalypse. But not all mutants agree with Apocalypse’s rule, including a group of ragtag freedom fighters led by Xavier’s oldest friend, Magneto. Only united can the Amazing X-Men put an end to the Age of Apocalypse!

This expansion brings a whole new take on the X-Men. In a world ruled by Apocalypse and his cohorts, heroes like Beast have gone villainous, while villains like Magneto and Sabretooth form the heroic resistance, joined by new X-Men Heroes. The Age of Apocalypse brings complex new challenges and unorthodox Heroes battling in an apocalyptic setting.

—description from the publisher