Originally posted by Flare |UKCS|:

Have you considered Deep Rock Galactic ?

https://store.steampowered.com/app/548430/Deep_Rock_Galactic/

Its on sale at the moment, offers a simple gameplay look where you take a space age Dwarf down procedurally generated mines and caverns to do missions, fight off aggressive fauna and nab the loot, then have a drink at the hub bar while dancing to jukebox tunes.
It can also be played co-op with 4 players and the dwarves are divided into classes which can make for fun co op matches with players doing different but important roles.

I came here to say this. Great game , great co-op, same publisher. The combat is a little more intense and not nearly as forgiving as Valheim.