I'd say since I was about five, but that's being fairly generous as I have enjoyed games for my entire life. I grew up with a bit of an arcade in my basement, with Mortal Kombat arcade cabinet and a Mr. Do (An awesome game that's kinda like Pac-man, but better in my opinion), as well as a slot machine, a dart board, a jukebox, and even a pinball machine (my family used to be very well off, but hard times hit our state). So I've been gaming for 17 out of my 20 years on this planet. My first game that I beat was Mortal Kombat, and the last one was likely L.A. Noire.