Nine Parchments - Top down Magic slinging romp. Similar to the Majica series, but with less knowing how to do certain key-press combos.
Orcs Must Die 2 - 3rd person tower defense where you place traps and use spells and weapons to take down foes. Continues the story of the first game, which did not have multiplayer, unfortunately.
Children of Morta - Top down dungeon crawler. Take on the roles of a family trying to hunt down an ancient evil. Like the Belmont's of Castlevania fame.
Full Metal Furies - Top down action fighter. Fight the Titans as some of the last remaining survivors of Ragnarok. Fun dialing with a good-sized world map to explore.
Astroneer - 3rd person survival crafting on a randomized planet. Cute component designs and a unique air management system. Plays best with a mouse & keyboard.
Deep Rock Galactic - Space Dwarves Corporate mining simulator. You and up to 4 friends drive do into infested planetoids in order to make some Gold. Destructible terrain and shenanigans.
I haven't played the third one co-op yet, unfortunately so I can only assume that it holds up like the second one does.