Legend of Zelda: Ocriana of Time. An installment of the Zelda series for the N64 released in 1998. An revolutinary Action/Adventure/RPG game with an excellent graphics engine (for its time) and an awesome battle system (often copied) that kicks the shit out of
FF7's battle system.
The game was eventually
succeded by the partial-sequal
Majora's mask (probably the darkest zelda game), and then Windwaker for GameCube. Oot was also rereleased as a extra disc for people who preorded WindWaker.