X-Men: The Ultimate Collection contains all five X-Men movies:

X-Men
When teenage mutant Rogue's mutant abilities manifest with dire consequences, she runs away from home. She encounters the gruff mutant, Logan and despite his callous exterior, mysterious past and razor sharp claws, they quickly becomes friends. When two evil mutants attack the unlikely companions, the X-Men come to their rescue and bring Rogue and Logan back to Professor Charles Xavier and his School for Gifted Youngsters, a safe haven for mutants where they can learn to harness their abilities.

As the X-Men uncover that Magneto, an immensely powerful mutant and Holocaust survivor bent on punishing humanity for its intolerance of mutantkind, was behind the attack, the team fears that Magneto and his mutant terrorists might be planning an act of war that could threaten the entire human race. Can the X-Men and their new members put a stop to Magneto's madness before it's too late?

X-Men 2
Once again the fate of the mutant race is in the hands of the X-Men. After an attempted assassination of the president by a befuddled outcast mutant named Nightcrawler, the X-Men find themselves at odds with the rogue government official William Stryker. Stryker's vile plan is to use Professor Xavier's powers and technology to wipe out Homo Superior.

X-Men: The Last Stand
A “cure” has been developed for mutants, but what does this mean for the children of the atom? Worthington Labs, the developer of this cure, finds itself in the sights of one of the most powerful mutants of all time: Magneto. With a growing army, Magneto storms the lab, aiming to annihilate the source of the cure–a young, frightened mutant.

X-Men Origins: Wolverine
Hugh Jackman unsheathes the claws once again as he plays the fan-favorite mutant Wolverine in “X-Men Origins: Wolverine”.

Directed by Gavin Hood, “X-Men Origins: Wolverine” pits Wolverine against Sabretooth, played by Liev Schreiber and a host of other mutants including Blob and Deadpool, as well as the nefarious Weapon X project.

X-Men: First Class
Follow the formative years of the X-Men and the relationship between Charles Xavier and Erik Lehnsherr, a.k.a. Magneto. Directed by Matthew Vaughn, “X-Men: First Class” stars Michael Fassbender, Rose Byrne January Jones, Jason Flemyng, Nicholas Hoult, Lucas Till, Zoe Kravitz, Jennifer Lawrence, James McAvoy and more!