Ocarina of Time. After the action and increasingly beautiful pixel art of the first four Zelda games, I found the 3D one boring and ugly.

Ghost Manor for the 2600 is a fun game with lots of atmosphere. However it’s also pretty simple and will only occupy you for 10-20 minutes. It sure was a blast when I was a little kid, though.

There’s also Monster Bash, the 1982 Sega arcade game.