Video Game Franchise with Best OST?

[Leynos]

Ys. From the first game having the legendary Yuzo Koshiro but the entire series has insane OST's

Just a few samples of the Ys series. Every game has fucking amazing OSTs tho

The Ninja Warriors. Both games are great but the first is so fucking stellar. It has maybe the best song ever with Daddy Mulk.

Jet Set Radio.  Some of the most unique an awesome music for any series that exists. Then JSRF is one of my faves ever. 

Gates/Lords of Thunder. Two great shmups from the 16-bit era and have great music. Lords is so metal is peaks to my souls.

Chrono series. From the memorable tunes in Trigger on SNES ro the haunting;y beautiful music of Cross. 

Streets of Rage series are all great. Esp the one with Yuzo Koshiro doing the entire OST. He also contributed to SOR4. 

Be here all day if I included shmup series outside the of thunder series I posted.

I will even include Grandia series. Instead of spamming a bunch of Grandia songs. I will just post maybe the best RPG theme ever.