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X Men
In a world where both Mutants and Humans fear each other, Marie, better known as Rogue, runs away from home and hitches a ride with another mutant, known as Logan, a.k.a. Wolverine. Charles Xavier, who owns a school for young mutants, sends Storm and Cyclops to bring them back before it is too late. Magneto, who believes a war is approaching, has an evil plan in mind, and needs young Rogue to help him.
X2
Several months have passed since The X-Men defeated Magneto and imprisoned him in a seemingly impregnable plastic chamber. One day, a mutant by the name of Nightcrawler infiltrates the White House and attempts to assassinate the president, setting off a chain reaction of anti-mutant measures by the government. Meanwhile, Logan is trying to discover his past. As scientist named William Stryker discovers Professor X's secret school and Cerebro, Magneto's partner, Mystique, is planning to break her leader out of prison. But when Professor X's school is attacked by Stryker's forces, Logan, Rogue, Iceman and a few are lucky to escape. Those who remain meet in Boston, where they form an uneasy alliance with Magneto to stop Stryker and rescue Professor X.
X-Men: The Last Stand
When a cure is created, which apparently can turn any mutant into a normal human being, there is outrage amongst the mutant community. Whilst some mutants do like the idea of a cure, including Rogue, many mutants find that there shouldn't be a cure. Magneto, who still believes a war is coming, recruits a large team of mutants to take down Warren Worthington II and his cure. Might seem easy for the X-Men to stop, but Magneto has a big advantage, which Wolverine doesn't have. Jean Grey has returned, and joined with Magneto. The Phoenix has woken within her, which has the ability to destroy anything in her way, even if that 'anything' is a X-Men.
X: First Class (2011)
Before Charles Xavier and Erik Lensherr took the names Professor X and Magneto, they were two young men discovering their powers for the first time. Before they were archenemies, they were closest of friends, working together, with other Mutants (some familiar, some new), to stop the greatest threat the world has ever known. In the process, a rift between them opened, which began the eternal war between Magneto's Brotherhood and Professor X's X-MEN.
X-Men: Days of Future Past (2014)
Sentinels, robots that were created for the purpose of hunting down mutants were released in 1973. 50 years later the Sentinels would also hunt humans who aid mutants. Charles Xavier and his X-Men try their best to deal with the Sentinels but they are able to adapt and deal with all mutant abilities. Charles decides to go back in time and change things. He asks Kitty Pryde who can send a person's consciousness into the person's past to send him but she can only send someone back a few weeks because if she sends someone back further it could harm them. So Logan decides to go back himself because he might be able to withstand it. So Charles tells him that it's Mystique who's responsible because when she learned about the Sentinels she sought out Bolivar Trask the man who created them and killed him. She would be caught and studied and her ability to change was somehow added to the Sentinels which is why they can adapt. Logan must go to the younger Charles and ask him to help; problem is...
X-Men: Apocalypse (2016)
Since the dawn of civilization, he was worshipped as a God. Apocalypse, the first and most powerful mutant from Marvel's X-Men universe, amassed the powers of many other mutants, becoming immortal and invincible. Upon awakening after thousands of years, he is disillusioned with the world as he finds it and recruits a team of powerful mutants, including a disheartened Magneto, to cleanse mankind and create a new world order, over which he will reign. As the fate of the Earth hangs in the balance, Raven with the help of Professor X must lead a team of young X-Men to stop their greatest nemesis and save mankind from complete destruction.