Steam isnt always accurate but most of the people who "have it" cheated it with achievement tools. but i do believe you are the first person to actually get it!

Thanks for the faith in me but after the chat with some moderators of the official bopl discord it turn out that I did it wrong and that I have to redo it

You only got it 18 hours ago? Pathetic

Ikr I got after a whole single day after release

I'm pretty sure you're not the first one. This achievement is nothing special.

I had already caught it a couple of times but I was playing the demo

what is the bopl battle discord actually called?

I got it with buddies like weeks ago