Didn't expect this one to be on the list, did you?
Rest assured reader, I have indeed played Super Mario Bros. before. A good few times in fact, though not so much the NES version that really kicked the whole Mario thing off. Yes, yes, there was Mario Bros. in the arcade and on the Atari and what have you, but it was the Super Mario line that made an impression on millions upon millions of gamers worldwide.
Super Mario Bros. saw an arcade release, but it was in its element on the Nintendo Entertainment System. That was before my time though, and I was first introduced to Super Mario Bros. in the form of Super Mario All-Stars on the SNES. My cousins only had a handful of games for their SNES, but they consistently kicked my arse at every one of them.
All-Stars contained an improved and graphically updated version of Super Mario Bros. and while I find myself having a little more success with that version, we really ought to go back to where it all began.