I was a bit of a late bloomer, I didn't start gaming until I was 15 or so (I'm 22). The game that really got me hooked to video game is general was Twilight Princess on the GameCube. It was the first long and 'difficult' (for me at the time, anyway) game I had ever played and I was really amazed with how much fun I had. I've been playing games ever since, but every now and then I still feel the urge to replay that game.