http://www.squakenet.com/download/dawn-raider/5809/
Dawnraider: vertical scrolling shooter by some japanese company.
Year: 1990
Specialities: you can hold fire to power up the main weapon, to make it fire for some seconds depending on how much force it built up.
you also need to decide if the power-ups shall be fuel, rockets, or a permanent upgrade of the main guns. While the later might be tempting, you need to refuel at some point or else the plane crash lands.
two player supported.