I'm looking for game recommendations on PC.

What I look for is:

1) A co-op game I can play with my brother.
It needs to be a built in co-op, like something that is based on Steam invitations and not something that will require us to raise a server somewhere.
But I prefer it not to be a full multiplayer game (unless it focuses on small groups that can basically ignore everyone else).

2) It needs to be relaxing.
It doesn't have to be Stardew Valley, I don't mind if death is a possibility, but the purpose is to relax a bit after work every couple of days, not to frustrate us like in "Don't starve together".

Other than that I'm not picky.
It can be a crafting 2d game, turn based, basically anything.