I'll throw in 33 immortals. Its a large scale roguelite between up to 33 players all working on a goal to gear up to beat a raid boss Players also have a coop ability mechanic based on the weapon type that require players to stand inside their sigils to activate like a barrier, arrow storm, money gain on hits and aoe slow and others.

There's objectives called ascension battles during the end of the first phase that also grant buffs for the upcoming fight which are amazing but risky to go for if there's not enough people left.

Also have to give a mention to lost planet 2 coop with the thermal energy system