King Kong

I voted for Zelda 1, but right after remembered how much fun I had with Zelda 2 back then. Zelda 1 was about discoveries(back then, you could not search on gamefaqs to discover the hidden dungeons which were essentials to complete the game) and skills while Zelda 2 required even more skills. Me and a friend had a great fun with Zelda 2, trying to beat it the first.