Jim and Bob are the names of an unlikely pair of robots who've just volunteered to rescue a Princess. One or two players participate, guiding the intrepid duo over a series of horizontally scrolling landscapes.
The screen scrolls at a constant speed as the robots climb and jump - consequently, slowing down and allowing the scrolling to catch up results in their destruction. Life-removing aliens roam the landscape, making the task just that little bit harder.
The robot's plodding pace tends to make the game frustrating, and consequently there's very little instant reward. Deliverance could well give amusement on a rainy Sunday afternoon, but otherwise...