I guess I'll release a few characters of my own.
Name: Jonathan Servastus
Alias: The Gamemaster
Species: Human, Cyborg
Powers/Abilities: None. But although he may not have any superpowers or supernatural abilities, that doesn't mean he should be discounted. The Gamemaster possesses a wealth of intellect and talents in many practical and scientific fields, most taught to him by his mentor. He can create monsters, and also likes creating SAW-style traps for his victims.
He is also the master of illusions and lies, and tends to hide behind smoke and mirrors.
Additionally, The Gamemaster seems to have some sense of combat knowledge, and can fight fairly well in Hand-to-hand, going toe-to-toe with beings much more powerful than him.
Weapons: The Gamemaster has a robotic right arm, which can morph into a variety of tools and weapons including a laser gun and saw.
He is also skilled with wielding his cane(Built in with various different functions) as a staff.
Crimes: Oh you know, the usual: Robbery, Kidnapping, Murder, Terrorism on a universal scale, etc.
(Credit to Runa)
There is a lot to unpack with The Gamemaster's backstory and past, so to save the trouble we'll just run through the basic, significant points of his life.
As a child, Jonathan Servastus liked to play games. This hobby would go on to play a large factor in shaping his villainous persona.
One day, 50 years ago, Jonathan's homeworld had been invaded and ambushed by Xir'algath forces. He sustained serious injuries in an explosion, with low chances of survival. However, Dr. Zed, his mentor, had found Jonathan close to death, and took him in. He gave him lifesaving surgery, including the attachment of a robotic arm and cybernetic implants. However, he would never be the same. Jonathan suddenly experienced an urge to be in control of every situation. Additionally, the nanotech used in healing his wounds had malfunctioned, and were now being concentrated in his brain where they rewired and tampered with his mind. All these factors, combined with the trauma of the explosion and surgery, drove Jonathan insane. He killed Dr. Zed in a psychotic episode, and adopted the villain identity of "The Gamemaster".
The gamemaster went on to host various twisted game shows of his design, torturing the contestants for his own entertainment.
One day, his crimes would catch up to him with his newest game, "Arena Battle!". After failing to kill the gane's participants, The Gamemaster was run out of town and into hiding by them.
Afterwards, The Gamemaster schemed numerous other plans, all of which ended in defeat, and his eventual death at the hands of Mark Mcneil.
The Gamemaster was later revived by the Xir'algath to fight Mark and The Resistance, moreso as psychological warfare. He was then caught and arrested by The Council of Life, and has been in Whitegate ever since.
Name: Alistair Spencer
Alias: Plague Knight
Species: Human, Semi-Alien Hybrid, Undead, Cyborg
Plague Knight has access to powerful telekinetic and psionic abilities. He can remotely control and move multiple objects at a time, from anything as small as a pebble to as large as a semi-truck, though something this large would cause great mental strain. Plague Knight can also fire blasts of a psychically-generated Red Plasma from his fingertips.
Plague Knight has a mostly Cybernetic physiology, composed mainly of self-repairing nanomachines. Meaning, any damage that he sustains can be almost instantly repaired or reattached.
Due to a byproduct caused by "The Savager Serum" being used in his resurrection, Plague Knight has a Berserker form, in which he transforms into a large, crow-like beast.
As for natural skills and talents, Plague Knight has mastery over almost all fighting styles, and skillfully wields almost any blade or firearm, a result of his many years of training by the Plague Doctor society. However, his weapon of choice is most often a chemical one.
Speaking of which, Plague knight wais also well-read in the arts and sciences of Alchemy, Chemistry and Biology, among other things.
A dark cloud of mist resides underneath and around Plague Knight's cloak. This is actually a swarm of hive-minded nanites, which he has a telepathic link to. He can detach some of the nanites from the swarm, and use it to shape small objects or weapons, though greater concentration is required for larger objects. The swarm can also propel him off the ground, creating the illusion of flight and levitation.
Crimes: Plague Knight is responsible for many atrocities. He is a notorious bioterrorist, cult leader and mercenary, having once nearly brought about a zombie apocalypse. More recently, he assembled nearly all of Earth's villains together to form a team with the goal of conquering the planet. Plague Knight is also in league with the Xir'algath, giving him a farther-reaching influence.
Growing up in a war-torn, third world country, Alistair only knew war as a child. When soldiers of the opposing Militia invaded his home and slaughtered his family, Alistair fled, escaping the traumatizing, violent scene. Eventually, after running through the jungles for some time, Alistair had stumbled upon a temple, belonging to the Society of Plague Doctors, a cult of mercenaries. Taking pity on the boy, the Plague Doctors took him in, and trained Alistair to eventually become one of them. As a product of past experiences, and the teachings that he had received from the Plague Doctors, Alistair came to believe that mankind was a doomed race, full of sinners, and that the only path to salvation was to eliminate all those who sin, leaving only the pure to rule the new world.
One day, on one of his first missions as a Plague Doctor at a chemical plant, Alistair and his team were sabotaged by Christine Warren, a newly minted agent of the CIA. Alistair was caught in a chemical explosion and was believed dead by the public at large.
However, he had secretly survived, managing to cling to life just long enough for him to be found by the Plague Doctors. Despite their best efforts to revive him, Alistair eventually died, his body ravaged by disease and chemical infections.
But then, a mysterious figure came along, and they injected a mysterious black fluid into Alistair, bringing him back to life. After hours of operation and experimentation by the Plague Doctors, Alistair was somewhat rehabilitated, but he would never fully recover. A special suit had been constructed for him so his disabilities could be made more bearable, and he resumed his work as a Plague Doctor. Over time, he ascended the ranks all the way to the top, becoming the cult's leader.
Alistair then began to enact his plan to "cleanse" mankind by summoning a powerful deity in their mythology: The Moon.
However, his plans were thwarted by a man named Detective Pierce and the heroes of the City of Heroes, and the Alistair was killed in combat with them after mutating into a horrific monster from the zombie mutagen that he released.
40 years later, Trevor Hartman, a Neo-Plague Doctor cultist, resurrected Alistair, who was more than ready to finish what he had started.
After the arrival of "The Prophesized One", Plague Knight took it as a sign that the "Saviors"(The Xir'algath) would soon arrive to "cleanse" Earth. He assembled a team of the most powerful other villains and organizations to prepare Earth for the Xir'algath's arrival. To this end the alliance mostly succeeded, but Plague Knight's plan fell apart towards the end due to the intervention of Mark and Earth's other heroes.
Seeing no other option, Plague Knight fled Earth with The Xir'algath just before its destruction, abandoning his cult.
Later, Plague Knight fought alongside The Gakemaster and other villains from Mark's past for The Xir'algath, before he was arrested and imprisoned by The Council of Life. He now resides in Whitegate to this day...