Think you could vibe with my favorite Swedish Doom Metal album of an RPG, Mörk Borg? I've also played Cy_Borg, though haven't tried Pirate Borg yet. Pretty rules-light, very much focused on the bleak vibes of a tired world on the brink of Armageddon. Can do DM+1 player with a little tweaking, but anyone reading this is invited to DM me.

I could set up a matrix room and do a session zero to walk through the rules if you'd like!