BIOGRAPHY page 2
With the Upstarts all but given up on their games, the Gamesmaster himself still sought distraction. His next known machinations occurred at the Weisman Institute for the Criminally Insane in Vermont where he took over the body of Jeremy Stevens, a ten year old boy who had been institutionalized indefinitely. Though in this weak, pre-pubescent body, the Gamesmaster terrorized the facility’s chief psychologist, Dr. Weisman. By happenstance, Dr. Weisman was a colleague of Charles Xavier and, when she stopped corresponding with him, Siryn of X-Force was sent to investigate. The Gamesmaster easily took Siryn prisoner, committing her as an institutionalized inmate. However, when Deadpool came to rescue her, the Gamesmaster took him prisoner in her stead and released her, albeit with false memories of a successfully completed, though uneventful, mission. [X-Force (1st series) #46-47]
Fortunately for Deadpool, the Gamesmaster grip over Siryn’s memory was not absolute and some weeks later she suddenly remembered what had actually happened. Along with her teammate 
Shatterstar, Siryn returned to the Weisman Institute. The Gamesmaster used this opportunity to mess with Shatterstar, implanting the idea that Shatterstar was not a genetically-engineered warrior from the Mojoverse, but actually a human called Benjamin Russell. Despite his illusions and lies, the Gamesmaster was defeated by Siryn, who purged him from his control over Jeremy Stevens and Dr. Weisman, and freeing Deadpool. However, Shatterstar was shaken over what the Gamesmaster had told him and was no longer sure what was true and what were lies. [X-Force (1st series) #56]
The question of the Gamesmasters’ words continued to weigh on Shatterstar’s mind, so much so that when the villainous Spiral offered an explanation Shatterstar jumped at the chance. Despite her own history of lies and manipulation, Shatterstar allowed her to perform a ritual which seemed to merge him with the comatose Benjamin Russell. Although neither the ritual nor its outcome was ever fully explained, Shatterstar claimed that he felt whole first the first time in a long while. Whatever the truth was of the situation, or his connection to either Spiral’s actions or the man known as Benjamin Russell, the Gamesmaster watched from afar and laughed hysterically. [X-Force (1st series) #61]
The Gamesmaster eventually sought out bigger targets, notably the X-Men. As with Shatterstar, the omnipath intended to make them question their very reality. However, before doing so, he 
needed to neutralize the only telepath among them powerful enough to stop him – Jean Grey. To do so, he kidnapped and imprisoned her on the psychic plane, freeing him to create a perfect world for the X-Men to live in, one in which they were not hated and feared.
However, the X-Men's Joseph somehow saw through this false reality and, together with Gambit and Rogue, sought to free Jean and confront the Gamesmaster. When the Gamesmaster became 
frustrated that Joseph would not sacrifice Jean Grey so that the X-Men could live a peaceful life, neither persecuted nor dying of disease, he offered Joseph something a little closer to home – kill Gambit. Not only would this take away his only obstacle between he and Rogue forming a relationship but the Gamesmaster would change humanity's views on mutantkind – permanently. Joseph, of course, refused.
Distracted by Joseph, the Gamesmaster was not concentrating on Jean Grey, who donned psychic armor and used this moment to escape. The Gamesmaster retreated to the “Mindstream” but Jean was able to follow him and trap him, where she learned that he did not have the power to reshape the world as he boasted. Unashamed, the Gamesmaster claimed he simply wanted to sabotage Joseph's newfound heroism, believing him to be Magneto. On the defensive, the Gamesmaster realized that Jean was about to uncover all his many mysteries, so he allowed his psychic form to crumble away. As he escaped, the Gamesmaster told Jean that she would never understand him. [X-Men Annual '97]
For the next several years, the Gamesmaster remained mysteriously quiet. However, the omnipath eventually resurfaced after taking an interest in the tormented young mutant X-23. Drawing her into the “Mindstream,” the Gamesmaster informed her that he had been watching her 
for some time. He was fascinated by her “clean” mind and that, if he focused on her, he could turn off the minds of everyone else. He also hinted that he had lost at least some of his own mental struggles due to the cacophony of humanity’s minds and that he no longer knew his own, true identity, existing only in the Mindstream. The Gamesmaster offered X-23 a union of sorts, one which would give him peace and her an entire world. As with those he had previously propositioned, the Gamesmaster was refused. Rather than react vengefully, however, he allowed X-23 to leave, but not without warning her that he would always be with her – watching. [X-23 one-shot #1]
Whatever plans the Gamesmaster had for X-23, he never again interfered with her directly, though shortly after their encounter it was implied that he was still with her. [X-23 (2nd series) #3] As with everything regarding the Gamesmaster, nothing is known for sure.