Super Mario Bros. - NES
Super Mario Bros. further popularised the side-scrolling platform genre, and in a way, pretty much saved the video game industry after a two year slump the 1983 video game crash.
For over 20 years, Super Mario Bros. was the best selling game of all time with over 40 million copies sold. Wii Sports has since taken over the title, but Super Mario Bros is undeniably responsible for the huge success of the NES and what caused Mario to be the worldwide icon we know him as today.
The game shipped with a diverse set of 32 levels, split up into eight worlds with four stages for each and they're all just as much fun as each last. A variety of enemies and underwater levels kept the levels interesting.
It was unlike any platform game before it, offering gamers an unparalleled sense of freedom whilst traversing the Mushroom Kingdom. The game featured secret areas, invisible blocks and hidden warp-zones aplenty, and trying to find them all and uncover programming 'glitches' such as the infinite 1-up trick kept players coming back for a long time.
All in all, Super Mario Bros. was a landmark title and not only did it kick start the Mario series, which has to date sold over 260 million copies worldwide, it helped launch gaming into the mainstream as well.