Well, there are quite a few soundtracks in the days of old that still can blow me out of the water. Sonic 2 & 3, Streets of Rage, Rockman X, just to name a few…
But I’d pick Teenage Mutant Ninja Turtles 4: Turtles in Time. It was and still is simply amazing to me. It sounds fun, sounds great, and sounds so full of life. Fills me with joy every time I listen to that sweet sweet music.
Edit: LOL, typo in the title.