Majora's Mask is an underrated game that easily can compare to other Zelda classics like Ocarina of Time.
The newly introduced game play aspect unique to Majora's Mask is the addition of masks. Through the story, Link is able to acquire mask which can transform him into other races of characters; these being a deku scrub, a goron, and a zora.
Meanwhile, there are 4 dungeons the player must enter in his quest to stop Skull Kid. This is 4 or 5 less than its predecessor, Ocarina of Time, but each is well crafted, with even one case in which the player can turn the temple upside down. In addition, the game has a much stronger focus on sidequests.
It is also easily among the finest looking games on the N64 console, having considerable graphical improvements from Ocarina of Time.
Overall Majora's Mask is a very good game that any fan of the series must play.