The book originated as part of a revamp of the X-Men line of comics in 2001. Prior to this revamp, Claremont was writing both of the main X-Men titles (Uncanny X-Men and X-Men, the latter of which became New X-Men, and then X-Men: Legacy). He was removed from both core X-titles by Editor-in-Chief Joe Quesada when his storylines fell apart due to editorial interference by the previous editor-in-chief in a failed attempt to capitalize on the first X-Men movie. Quesada offered Claremont the opportunity to write only one of the core X-titles (while allowing new X-writer Grant Morrison to have partial storyline input) or to write a third, new core X-Men title. Claremont chose the latter. That title was dubbed X-Treme X-Men.
In May 2004, prompted by Grant Morrison's departure from New X-Men, Marvel felt that another revamp of the X-Men titles was required. As part of this revamp, called X-Men ReLoad, Chris Claremont returned to writing Uncanny X-Men. X-Treme X-Men was cancelled, with most of its cast and running plotlines being transferred to Uncanny X-Men. Joss Whedon and John Cassaday's Astonishing X-Men replaced it as the third core title.
The X-Treme X-Men contained Storm, Rogue, Gambit, Bishop, Sage (Tessa), Thunderbird (Neal Shaara), Psylocke and Beast as original line up. Psylocke was killed and Beast departed the title in the early goings, and new recruits Lifeguard (Heather Cameron) and Slipstream (Davis Cameron) were eventually added. Later in the series, familiar X-Men characters Cannonball, Lila Cheney, Shadowcat, Magma and Sunspot made regular appearances, with only Cannonball officially joining the team. Evangeline Whedon (a mutant possessing dragon transmorphic abilities) also made numerous appearances.
The title also introduced the character of Red Lotus, who featured heavily in the Australian arc, and was included in issues of the invasion arc.
Storm, Bishop, Sage, and Cannonball would appear in Uncanny X-Men, along with X-23, Rachel Summers, Nightcrawler, Wolverine and a resurrected Psylocke.
19-23 + X-Posť 1-2
01-06 + X-Men Unlimited #36
05-God Loves, Man Kills II
07--Storm - The Arena
08-Prisoner of Fire