Mage: The Ascension is a role-playing game based in the Classic World of Darkness, and was published by White Wolf Publishing in 1993.
The characters are magic using beings. The idea of magic in Mage is broadly inclusive of diverse ideas about mystical practices as well as other belief systems, such as science and religion, so that most mages do not resemble typical fantasy wizards.
The game was replaced with The New World of Darkness game rules plus the additional Mage: The Awakening rule set. The setting and premise are very different from the original game.