How do you play a Harry Potter RPG game? Is it homebrew or do you play one that already existed? Or just adapt other tabletop games like dnd/pathfinder?

Hey there! Good question.
We played with a homebrew adaptation of Chaosium, which is the TTRPG based on a table of skills and percentile dices. Call of Cthulhu is a good example of Chaosium.

But you could choose any sort of tabletop base honestly. It mostly depends on what you want to put the accent on. For us, it was the roleplay and story so that’s why we didn’t pick a DnD or Pathfinder approach.

Our fights are more narrative and we have more chases and diverse action based moments.

I hope this makes sense?!