Mega Man Xtreme takes place within the
Mega Man X series timeline, during the 22nd century in which humans and intelligent
androids called "Reploids" coexist. Daily life is under constant threat by "Mavericks", Reploids that have gone dangerously rogue. The series follows the exploits of
X and his partner
Zero, a pair of "Maverick Hunters" led by the benevolent
Dr. Cain. These hunters have been responsible for suppressing the threat of reploid uprising, particularly that of a dangerous Maverick leader named
Sigma. At the opening of the normal
difficulty mode of
Mega Man Xtreme, a
hacker named Techno from a band called the "Shadow Hunters" breaks into the world's Mother Computer, destabilizing all of the networks and allowing Mavericks wreak havoc everywhere. X awakens to find himself on the highway from his
first adventure to stop Sigma. Realizing it is merely a simulated replication, the protagonist is greeted by Zero, who informs X that the Maverick Hunters have partnered with a computer genius named Middy to stop the current crisis. With Middy's help, X dives into cyberspace to erase the battle data of four Maverick bosses from his previous missions. Once they are beaten, X makes his way to Mother Computer core and defeats the Shadow Hunter Zain, only to see Zain's companions Techno and Geemel retreat and Sigma unveils himself as the mastermind behind the hack. Dr. Cain manages to find Sigma's base, and X warps there via the Mother Computer core. At the hideout, X confronts Techno, firing his buster at the computer used to hack into the Mother Computer. Techno reveals that in order to hack into the Mother Computer he had to upload his own
CPU into the computer X destroyed. Middy arrives, revealing that Techno is his twin brother. Having been controlled by Sigma, Techno comes to his senses and dies. X continues on, finds Sigma, and defeats him. The computer core begins to detonate, but as X escapes, Middy chooses to stay, stating that he and his twin brother share a CPU and perishes alongside Techno. The hard mode of
Mega Man Xtreme partially extends the storyline, where Zero informs X that someone else has illegally accessed records from the Mother Computer and reproduced more Maverick data. The heroes soon learn that Geemel and Sigma are again responsible and dispatch both villains in a similar fashion. ==Gameplay==