Age of X
2011The X-Men wake up in a reality where mutants are under constant siege, huddled inside Fortress X as the last survivors of a genocidal human campaign. No one remembers the real world — except Legacy (Rogue), who begins to uncover the truth: this reality was created by Legion's fractured psyche. A tightly constructed alternate-reality story that explores what the X-Men would become if they had nothing left to lose.
6 core issues, 0 optional tie-ins/crossovers
Age of X chapter 1 — Fortress X is introduced; Legacy begins to question the reality around her
Age of X chapter 2 — The mutants defend their fortress; cracks in the reality appear
Age of X chapter 3 — Legacy discovers hidden memories; the truth about this world begins to surface
Age of X chapter 4 — The X-Men learn they're living in a constructed reality
Age of X chapter 5 — Legion is revealed as the architect; the X-Men fight to restore reality
Age of X conclusion — Reality is restored, but the experience leaves lasting marks on the team