Topic summary
Gyromite

Extracted from the Wikipedia article R.O.B..
Gyromite
The Gyromite retail package consists of the following items: two claws for R.O.B.'s hands; two heavy spinning tops called gyros; two red and blue trays upon which the gyros will rest, causing buttons to be pressed on the second NES controller; one spinner motor for accelerating the gyros; and two black trays upon which the gyros are stored when not in use. The Direct game mode is a feature used to learn how to use R.O.B. or to play with R.O.B. without playing the game. Gyromite is a puzzleplatform video game in which main character Professor Hector must collect dynamite before the time runs out, with his path blocked by several red and blue pillars and by dinosaur-like creatures called Smicks. Hector cannot jump, so he can only collect dynamite by descending upon it. He can collect radishes that attract the Smicks when dropped. In Game A, the commands are made by pressing START and then pushing the direction in which to move R.O.B., and using the A and B buttons to open and close his arms. If R.O.B. places a gyro on the red or blue button, it pushes the A or B button on the second NES controller, moving the pillar of the corresponding color. If both buttons need to be pressed at the same time, the gyros are placed in a spinner so that they will stay balanced on the button without R.O.B. holding it. Game B has the same controls, except that START does not need to be pressed to make R.O.B. accept a command.