It's hard to summarize what makes this game so great, because there's so much to talk about. For starters, there's the crisp and colorful graphics with the killer soundtrack—find a musical tribute here. Add to the mix some of the best two-player co-op action on the NES, the most famous cheat code ever, very tight controls, and what you have is a port that achieves the impossible and trumps the arcade original. Though most players struggle to beat this game with the code-enabled 30 lives, with quick reflexes and enough memorization experts have been known to breeze through all the stages with a single life. This video makes it look easy: