SoR1 is positively legendary for its soundtrack. On a good home hifi it sounded fantastic, and it contributed greatly to hammering-home the not-a-cartoon aesthetic of the gritty street brawler. Previous brawlers in that aesthetic were Final Fight and Double Dragon, but they lacked the neon glow, street punk clothing, and hard-thumping rave/dance sound track.
It's a shame that SoR4 sorta missed the mark on that. It just didn't really snag the simple clarity of SoR1's basslines.
These got a vinyl release recently
https://bleep.com/release/72066
Streets of Rage 2: https://www.youtube.com/watch?v=E5g-QHq925o
Streets of Rage 3: https://www.youtube.com/watch?v=kRrf-WxRsgs
The SOR3 soundtrack in particular showcases an avant-garde edge, closer to Autechre or Aphex Twin than traditional video game music, and generally more of a "club" aesthetic than anything I've heard in other 90's game music.