Midnight Mutants for the Atari 7800. The aptly named Dr. Evil has trapped Grampa in a giant pumpkin and it is up to you to get him out. The game features a celebrity appearance: your grandfather is represented by the likeness of Al "Grampa" Lewis from The Munsters!
You begin the adventure on the grounds of a mysterious mansion. To complete your mission, you will have to overcome monsters ranging from pesky bats to dangerous boss mutants. Weapons and mystical items are available to aid you.
The area to be explored covers several horizontally scrolling screens. The game uses a slightly elevated third-person viewpoint to show your character and the surroundings. An alternate display screen may be toggled which allows you to get hints and control the items in your inventory.