Nice too see some game developers have not forgotten the good old days Nintendo 2D games like Contra and SuperC. A new game HUNTDOWN will be released soon on Steam TBA. If you like old games Drawn by hand, pixel by pixel, Huntdown´s design is thoroughly made like a 16-bit game from the old days, but with a fluid action-packed gameplay.
More info at website: http://www.huntdowngame.com/about/
Also Kung Fury by Laser Unicorns was a nice attempt to go back to 80's they made a short film and a game too. Kung Fury Street Rage on Steam