The first 3D Action-Adventure masterpiece
Ocarina of Time was the new benchmark for action-adventure games at the time, it created a new standart that it was impossible to think any game would do it again.
When the game started I wasn't so sure of how good it would be, the games strenght was in its dungeons, having some real cool puzzles and sense of discovery.
But then, the master sword + time sequence happen (I won't spoil) and the game completely blew me away. It changed even the gameplay, but most amazingly, the new setting, giving a sense of urgency and that now it's your duty to finish this.
Zelda: OoT is on every "best games of all time" lists you can find, it's the favorite game for alot of people, and it's easy to understand why, the game gave the industry something that people couldn't imagine. Being the blueprint to lots of game to follow, but for alot of people that played the game at the time, it was never possible to another game to create the feeling this game did.
I was only able to beat it late, on the 3DS re-release and I'm still amazed by what this game accomplished at its time. It's a masterpiece, the highest ranking game on metacritic ratings.