For entire OSTs: any of the FromSoft soulslikes, Lies of P, Diablo 2 + Lord of Destruction, any Monster Hunter game really (especially the ones in Pokke village, so Freedom 2 and Freedom Unite/Portable 2nd G), Hollow Knight, currently enjoying Ridge Racer's (PSP) soundtrack for working out, Deltarune and Undertale, Tony Hawk's Pro Skater 3 and Bboy the Game for some perfect-vibe licensed music...

Disco Elysium's is my current favourite OST, but the game itself might also just be current favourite game.

As for individual tracks, I like the Spanish guitar portion of "The Drive/First Contact" off the RE4 soundtrack. Back when I started out with breaking ("breakdance"), think 2008/9ish, we had a remix of that specific part of the song that would play often - I've got very fond memories of that. The song itself, its remixes and the remake versions actually are some of my favourite running music for the gym.

Here's the remix in question if anyone's interested: https://youtu.be/SMWV-3pbcLE

As for one favourite individual song from each of the aforementioned OSTs:

• Hunter's Dream (Bloodborne)
• Shadow Flower (Lies of P)
• Rogue (Diablo 2) + Lord of Destruction intro
• Pokke Village theme (MH Freedom 2/Unite/Generations (Ultimate)) and Mizutsune theme (first fought in Generations)
• Mantis Lords (Hollow Knight)
• Rotterdam Nation - Remix (Ridge Racer)
• Ruins (Undertale) and My Castle Town (Deltarune)
• I'm a Swing It by House of Pain or Ace of Spades by Motörhead (THPS3)
• Don't Sweat the Technique by Rakim or Apache by Incredible Bongo Band (Bboy the Game)

This was lots of fun to think about. I hope anyone reading can find something of value here. :)