Defender

Defender is a side-scrolling shooter arcade game made by Williams Electronics and released in 1981, after its debut at the November 1980 AMOA trade show. Developed by Eugene Jarvis, it has the player fly over a planet's surface destroying alien landers and protecting humanoids, using a joystick and five buttons for fire, thrust, reverse, hyperspace and smart bomb. It was sold in upright and cocktail cabinets.

Text from OyList