Vertical Intercept is a one-button game for two players.
In Horizontal Intercept the player has to destroy enemy spaceships with the use of rockets. The spaceships pass by horizontally and the player launches his rockets from the bottom of the screen.
Once the rocket is in the air he can steer it left or right. The player has 20 rockets and the goal is simply to score as many points as possible. Some spaceships move faster and will therefore give more points, and there are both big and small spaceships, the latter being worth more points.