For the moment, yes! I just ran the installer with Lutris + wineGE 8-26 and it has been working fine for the few hours I played. No telling if it will change though.

Single player or multiplayer coop up to 3 people. It’s not a mmo or anything of that nature, no. Multiplayer progression works like in Grim Dawn where the host progresses their game and character; people that join don’t progress their own campaign progress, but do progress their character.

Edit: more info.