https://store.steampowered.com/app/330020/Children_of_Morta/ has local coop and is pretty easy to pick up, it's reminiscent of Gauntlet.
And like Soros mentioned if you don't mind playing old games it's super easy to fire up an emulator, Zombies Ate My Neighbors, Pocky and Rocky and Secret of Mana all have coop off the top of my head.
https://store.steampowered.com/app/330020/Children_of_Morta/ has local coop and is pretty easy to pick up, it's reminiscent of Gauntlet.
And like Soros mentioned if you don't mind playing old games it's super easy to fire up an emulator, Zombies Ate My Neighbors, Pocky and Rocky and Secret of Mana all have coop off the top of my head.
I'll second Morta, even singleplayer. Multiplayer is even better because each player can be a different class.
I should really go back and finish it, I think I was on the last or second to last area when I got distracted.