X-Men Quadrilogy - X Men 1 / 2 / 3 / Wolverine (DVD, Boxed set)

X-Men
Born into a world filled with prejudice are children who possess extraordinary and dangerous powers the result of unique genetic mutations. But under the tutelage of Professor Xavier, these and other outcasts learn to harness their powers for the good of mankind. Now they must protect those who fear them as the nefarious Magneto, who believes humans and mutants can never co-exist, unveils his sinister plan for the future!

X-Men 2
Hatred and distrust brew between human and mutantkind. An unprovoked mutant attack on the President gives General William Stryker his long-awaited opportunity to wage all-out war against the mutants. A war that would leave only one race victorious. The X-Men must unite with their old adversary Magneto to prevent a devastating confrontation that could destroy everyone on the planet.

X-Men 3
Experience the awesome power of the X-Men's epic, final battle as it is time to take a stand. After a controversial "cure" is discovered, mutants can choose to retain their superhuman abilities or give up their unique gifts and become "normal". When peaceful mutant leader Charles Xavier clashes with his militant counterpart, Magneto, the battle lines are drawn for the war to end all wars.

X-Men Origins: Wolverine
Leading up to the events of the first X-Men movie, X-Men Origins: Wolverine tells the story of Wolverine's epically violent and romantic past, his complex relationship with Victor Creed, and the ominous Weapon X program. Along the way, Wolverine encounters many mutants, both familiar and new, including surprise appearances by several legends of the X-Men universe whose appearances in the film series have long been anticipated.