Commodore Invaders

Commodore Invaders is a simple public domain semi-monochrome Space Invaders variant with a twist. Your ship is the Atari symbol, and instead of aliens, all the enemies are the Commodore symbol. This was a game developed in Germany by Heinz Küsters in 1986 using Broderbund Software's The Arcade Machine game development system.

Some levels provide cover, while others don't. Also, you can steer your shots.