Here is the video game “Galactic Conqueror”! Released in 1988 on DOS, it's still available and playable with some tinkering.
As rebel forces close in on the space station Gallion, you launch strikes against enemy-controlled planets in the most sophisticated techno-toy available to mankind, the space fighter Thunder Cloud II. Play Galactic Conqueror online!
The game is a blend of action sequences in an Afterburner-esque pseudo-3D view. These sequences vary between ground combat, aerial combat and space combat, with different motion physics and enemy craft. There is also a strategic battle choices on a galactic map invaded in real-time.
The PC version uses speaker tweaks to recreate the game’s tune on theoretically-inferior hardware.