X-Men Unlimited is the name of three comic book titles published by Marvel Comics. It is an anthology series, featuring standalone stories centered on members of the X-Men or other mutant characters. It explores character backstories, alternate storylines, and peripheral events outside the main X-Men continuity, mostly through self-contained stories that some of which supplement the core X-Men titles like Uncanny X-Men or X-Men.
The series debuted in June 1993 and ran for 49 issues until 2003, transitioning from a bimonthly to a monthly schedule. The second run lasted from 2004 to 2006 and produced 25 issues before the title was paused. The series was later relaunched in 2021 as a digital-exclusive Infinity Comics title. This run, tied to the Krakoan Age during which mutants established their own nation, featured supplementary stories that expanded the X-Men universe without disrupting the primary plotlines of the core titles.
This title allowed new and lesser-known writers and artists to write and draw X-Men comics. The comics were also usually self-contained stories; with the exception of a tie-in to the Onslaught crossover. This was particularly unique during the late 1990s when most X-Men titles frequently had story arcs that were several issues long. It ran as a quarterly feature releasing four issues per year until late 2002 when it converted into a monthly title.
The second series ran from early 2004 to early 2006. The series' final issue was in June 2006. Each issue contained two short self-contained stories; in almost every case each story would focus specifically on one character, giving an in-depth glimpse into their psyche.
X-Men Unlimited Infinity Comic was part of the Reign of X line of the X-Men comics featuring a rotating adventures of the Krakoan mutants, with the first arc featuring Wolverine's battle against A.I.M. This title was released in weekly chapters exclusively in Marvel's Infinity Comics. It later became part of the Destiny of X and Fall of X line.