King Kong 2: Ikari No Megaton Punch
This 1986 Zelda-like game requires you to visit 8 worlds, grab 8 keys, and head to world 9 to open the door to the final boss. One of many Famicom exclusive Konami games, it's loosely based on the film "King Kong Lives" which came out the same year. You play as the titular ape, hell bent on rescuing the love of your life. I love Lady Kong!