Pollux

Pollux is a vertical scrolling space themed shoot ’em up game where you take control of a spaceship that has to terminate the evil main computer of a 22nd century space station.

You fight a variety of space crafts, static guns and bosses. While playing destroyed enemies drop power-ups. These include: an automatic shooting power-up (A), plus one (limited) fire bomb (B), weapon power-up (P), short speed power-up (S), plus one up (U), homing missiles and three weapon patron power-ups (straight, three-way and four directions). You can play solo or with a friend.