Check out these excellent redesigned NES Box Covers. Each custom cover was submitted by various deviantART members due to a NES Covers Art Jam hosted by Carlos Lerma and HanzTheBox.

Game (Artist):
Castlevania III (HanzTheBox) | Double Dragon II (Ben Camberos)
Final Fantasy II (vikyou) | Super Mario Brothers (Ale Chong)
Super Metroid (Spel One) | River City Ransom (rocom)
Iron Sword (Carlos Lerma) | Super Mario Brothers (puggdogg)
Contra (drawmonkey) | Mega Man 2 (artmer)

Via: Carlos Lerma (deviantART) (Behance) (Twitter)