Super Mario World when I was 3 years old. My dad owned the car rental company in the next town over and someone left a Super Nintendo along with Super Mario World and Street Fighter II Turbo. He waited the holding period for someone to claim it and when no one did, brought it home. Of course, since Street Fighter was SO violent, my mother wouldn't let my sister and I play (snuck it every now and then), so my time was focused on Mario and I instantly took to it. My dad and sister would play too, but it really confused them how they kept dying, and I would go on level after level after level without a scratch. But hey, 3 year old with power, that was me and I was damn proud of it.