Game with a real or pseudo 3-D effect. Often with 2 displays.

Part of the game can be opened or moved. Sometimes it is required in gameplay.

Game with 2 or 3 seperate LCD screens.

Game with two LCD screens, for different sprites on the same stage.

Game with differently coloured sprites.

Game with magnifiying lens, for larger sprites.

Game with overlays for the screen, to play different games on one display.

Game with voice synthesizer or voice control.

Game with extra clock and/or alarm function.

Game with extra calculator functions.

Game with additional radio functions. Often with headphones.

Game with detachable controllers or multi game connection options.