Robo Aleste > Sega CD

Set in the deadly Sengoku era of Japan, the people are given giant robots to wage war with and the results are crazy! You must help your character Kage as he takes control of a powerful such robot called Aleste and takes on the evil feudal lord that rules his lands with an iron fist! Avenge your family's destruction by fighting through hordes of robots and defences until you bring the evil lord to justice!

For other games with a similar vibe from this retro system why not take a shot at more in the section of cool Sega CD titles. If you just wish for other great flying games to keep you in the air then Galaga, Mars Matrix and 1944 : The Loop Master are all great examples!