As the title says, you need to download PR if you want to stay in the group (because we play PR, obviously)

If you need more info I made a post: http://gtm.steamproxy.vip/groups/thegarbagemenprojectreality/discussions/0/517142892065375444/

Anyone who doesn't have PR by the end of the week is going to get kicked, so download that shit

Otherwise no other requirements (besides like, you know, playing the game).