If you're after more funny and frightening co-op games to play with friends, the recently announced Dig, Dig, Die could be a good one for you.
In Dig Dig Die, you and friends take on the role of pirates raiding graveyards from a cursed flying ship, digging up coffins and crypts in search of valuable loot. Armed with shovels, crowbars, and questionable weapons, crews must work together, or betray one another, to escape with their haul before the monsters hear them coming. With support for up to 6 players online it sounds like a good time.
Between raids you also get to do various activities aboard your ship and gear up, with vending machines to grab some useful items and there's a full casino to mess with your friends during some blackjack and roulette.
Sounds like reskinned R.E.P.O. to me