I play this one all the time on the emulator. This type of game is what i like cause it's almost like the R-Type series. It's games like this from this era i enjoy playing the most. The endless wave of aircraft coming at you. The hype of getting upgrades. The bosses that took many quarters to defeat. Glad I have unlimited coins aka freeplay mode
Thunder Force 2 was a pretty solid game as well but 3 really took the cake on that one. Other than one or two others I feel as though TF3 was one of my favorite all time games of the early 90's.