Galaga 94

Galaga 94 is based on Galaga the classic vertical shooter from Namco.

It's a fixed screen shooter in which the player moves right and left shooting at waves of alien spaceships as the swoop around the screen raining bombs and such like.
The player starts with a ship that is capable of firing three rockets, i.e. only three rockets can be in flight on screen at the same time. For every twenty aliens destroyed the game will send a 'bonus bringer' craft, destroy that and a bonus items will be dropped. Bonuses range from having more missiles on screen, shields, an extra life to a straightforward points increase