Katakis

Somewhere in the outer space, there is a planet called Katakis, populated by human colonies. Advanced artificial intelligent machines have been developed from the scientists but soon enough those machines overtook the planet and captured the colonies. You, one of the survivors, must pilot an advanced fighter called DS-H75 Eagle Fighter and attack the machines and retake the planet.
The game offers a variety of power-ups that increase your weaponry and shields, but hordes of incoming flying and ground enemies are your problem. At the end of each level there is an end-level boss, which requires a lot of hits in order to be taken down. As long as you press the fire-button, an more powerful shot is available.
Well, gameplay and features are too similar to the R-Type series, and as well as most of the levels design.
The game supports a two-player mode, in which the second player controls the Force module whilst the first player controls the Eagle Fighter (quite awkward that is).
Katakis is a great shooter, and also very addictive. One of the best back then.

Graphics are good, all using up to 32 colors on screen, and offer a few nice background details from the original C64 version whilst sprites move fast and scrolling is quite smooth.
Sound offers some typical stereo SFX, but there is no music during gameplay, rather than an ambient repetitive echo sound. The introductory tune and the level-complete/loading tunes though are great!