"Age of Apocalypse" is a 1995 comic book crossover storyline mostly published in the X-Men franchise of books by Marvel Comics. The Age of Apocalypse was retconned as having occurred in the alternate universe of Earth-295.
Civil War brings together Civil War #1 through Fantastic Four #542, Fantastic Four #543 through Civil War: The Confession #1. This collection covers the works named in its breakdown.
Crisis on Infinite Earths is a 1985 to 1986 American comic book crossover series published by DC Comics. Written by Marv Wolfman and pencilled by George Pérez, it was first released as a 12-issue limited series from April 1985 to March 1986.
House of X and Powers of X (abbreviated as HOX and POX) are two 2019 comic book miniseries published by Marvel Comics featuring the X-Men by writer Jonathan Hickman and artists Pepe Larraz, R. B. Silva, and Marte Gracia. Both books are part of a crossover storyline within the Marvel Universe that led to the "Dawn of X" relaunch and started the Krakoan Age (October 2019 – June 2024).
Secret Wars is a 2015 to 2016 American comic book crossover storyline published by Marvel Comics and recalls the 1984 to 1985 miniseries of the same name. Released on May 6, 2015, the storyline includes a core Secret Wars miniseries, written by Jonathan Hickman and drawn by Esad Ribić, which picks up from where the "Time Runs Out" storyline running in The Avengers and New Avengers ended.