I am looking for a game so long now. Finally i found a clue, which game it could be, but it´s not just yet.
It´s like Raiden, with a 2-Player mode and a red and blue jet/starship. But as i remember you see the jets from behind like in Lylat Wars. The clue in this game was that you were able to pugrade anything on your ships like your weapons, armor or size of your wings and so on. If i am right, the gamename might have had just a few letters, but i am not sure.
I would be glad if someone can give me any hint.
Edit: i#m not sure, but i think i played it about 9-11 years ago on my pc.