Alpha-1 (1988)

Alpha-1 is 2D side-scrolling slow-paced shoot'em up game in space, similar to R-Type. The player is pilot of Alpha-1 space craft, he fights against robotic-looking aliens' invasion - aliens invade Earth, and action takes place in space and aliens' lair. The player flies right forward and kill all enemies on screen. Alpha-1 has upgradeable energy cannon, ship can shoot down enemy missiles.