The Jamaican superstar won gold at both 100m and 200m at the 2008 and 2012 Olympics, the first man in history to claim the sprint double at consecutive Games.
He also won 4x100m relay gold at both Games, and will attempt to win three golds for the third time running - something he described as his "biggest dream at the Olympics".
But doing so isn't his only dream: Bolt admits that what he wants most of all is to break the 19-second mark for the 200m, an achievement that would have seemed unfathomable a couple of decades ago, when the record stood not much under 20 seconds.
So can he do it? Let's take a look.
"I've said the only big thing, big time I want to run is the 200 metres," said Bolt on Tuesday.
"I'd love to try to go sub-19. That's the only thing I would really, really want because that's one of my goals.
"I've always talked about and always wanted it so for me, that's...