Alternative versions of Colossus

Age of Apocalypse

In the Age of Apocalypse timeline, Colossus was a very haunted man, wearing a red mask to cover acid scars on his face. His sister, Illyana, was thought to have died years prior, and his brother, Mikhail, was captured by Apocalypse. Colossus became leader of the Super Soldiers and faced his brainwashed brother in combat. Now a Horseman of Apocalypse, Mikhail destroyed all of Russia's superheroes except his brother, and from that day the severely beaten Colossus chose to dedicate his life to stopping Apocalypse and Mikhail. He left Russia to find the X-Men. Colossus was one of Magneto's original recruits for his X-Men.

During his first mission as an X-Man, Colossus battled Sabretooth for the life of a young mutant named Shadowcat. Colossus fell in love with her, and the two would eventually marry. After years of fighting for Magneto's cause, Colossus lost the will to fight on a battlefield in Africa. He decided to retire from the X-Men. As a final favor to Magneto, he agreed to teach the next generation of mutants with his wife.

Colossus came out of retirement two times. The first time, he was injured so severely only Magneto's metal powers kept him alive. Colossus could not transform back to his human self without risking death. The second time, Magneto offered Colossus and Kitty an important mission. It was discovered that Illyana was indeed still alive and being held prisoner in a slave camp, and they needed to save her so they could restore the true timeline.

Colossus and Shadowcat sent their team into the Seattle Core to rescue Illyana. After they found her, Colossus demanded Shadowcat evacuate Illyana immediately, leaving their students behind. Shadowcat disagreed, but followed his orders after he told her that he would go back for their students. Colossus reached the front gate and peered back into the Core. Only one student, Husk, remained standing. Colossus allowed the gate to close without attempting to help. He returned to his wife and sister and claimed he had done all he could.

Colossus and Shadowcat delivered Illyana to Magneto, but after learning the reality Magneto was trying to save was a place where his sister was dead, Colossus went mad. He tried to follow his sister into the M'Kraan Crystal, injuring Iceman in the process, and when Shadowcat stepped in front of him, assuming he would calm down, he didn't. Colossus crushed his wife and killed her. Insane with grief, he was finally taken down by Gambit.

Mortally injured, he reverts to his human form and dies after his sister returns from the M'kraan Crystal.

Years later, when Weapon X had been transformed into Weapon Omega, the Heir of Apocalypse, Colossus was brought back to life through the combined efforts of Sugarman and Dark Beast, who had taken great pains to find and preserve his body. Along with many other "alphas", his mind was altered, turning him into a servant of Weapon Omega.

He was sent together with Azazel and Cyclops to confront another resurrected "alpha", Penance. Penance used her telepathic powers to restore Colossus' true memories, and he swore to help her in her quest to rebuild the world and lead mutants to a brighter future. A fight broke out between him and Cyclop, but Azazel teleported Cyclops and himself away.

Earth X

In Earth X, Colossus has become Tsar Piotr of Russia. His country provides one of the greatest food sources for the world because of the intelligence of all animals. Occasionally, he is attacked by Life Model Decoys of Nick Fury, who seem to think that Piotr is a stereotypical Communist. It is mentioned in passing that at some point in the future, he will travel back in time and become Mister Sinister.

Exiles

Several versions of Colossus have been seen in the Exiles series.

Marvel Zombies

A version of Colossus is seen in Dead Days when the zombifed Alpha Flight attack the mansion. Later, he is seen among the survivors and fighting the other zombie heroes. Colossus, Nightcrawler, Storm, Dr. Strange, Nick Fury and Thor fight a holding action to protect a teleporter from the zombie forces. The group realizes that their plan to evacuate survivors might lead to another innocent world being infected so they destroy the machine and willingly give themselves up to the zombies. In Marvel Zombies: Halloween, Kitty Pryde and her son with Colossus, Peter Rasputin Pryde are two of the few surviving humans, years later.

X-Men Forever

In X-Men Forever, Colossus returns to Russia after the events of X-Men #1-3, where he becomes a government agent, handled by Natalia Romanova, the Black Widow, with whom he has struck up a romance. Although overjoyed to see his old team-mates again, he is intent on staying and serving his country.