Fuck Epic!

Heroic launcher should do the job

If you already own the game on Steam just use Proton. It ran perfectly fine for me through various proton versions over the years (whatever was the latest at the times I played) or proton expiremental. Before they dropped native support I would typically run the game through Proton anyways as it performed much better than the native Linux version at the time.

Otherwise using Heroic game launcher should be fine. Prior to Heroic getting popular I saw that people were installing Epic Games Store via Lutris and that ran Rocket League fine too.

Nice that it supposedly still works, scummy move nonetheless. I stopped playing Rocket League back when Epic had bought it and started requiring an Epic Account to play.

I've bought a game on Steam one day and then the new publisher decided that I can't play it just with the account I used when I bought it. Doesn't seem right to me.

I've never played Rocket League, but I have it, I'll try installing it and see if I can figure it out. Generally if you're looking for help running games on Linux then ProtonDB or Lutris.net will usually have some useful information.

I quit that piece of shit when it left steam. Proton should still work unless they have anticheat now or something.

heroic games launcher works just fine

Works fine in Proton, not sure what you have to do if you don't have the game on Steam

Can you install/use heroic launcher? That would be the easiest way I believe.

My friends are on Steam and it works fine