I don't really play much Warzone, but DMZ is fantastic. I mostly play it solo, but on the occasion I can get a teammate or two (that aren't just randoms), it's that much better.

I've only played a little It Takes Two, but it was well laid out in its cooperative elements, and I want to go back and finish it.

Overcooked is pure chaos, and if you've got a group of 4 people sitting on a couch yelling "I need lettuce" "WHERE ARE ALL THE PLATES" "uh, the hamburgers just caught fire" at each other at the same time, it can't be beat.

Minecraft is just pure fun when playing with friends, and you get to make it what you want.

Any/all Halos belong on this list, I just put the first one. Do you play Halo unless you go back and do a legendary co-op run with your best friend through the night with a case of energy drinks?

Sea of Thieves and No Man's Sky both are sort of open ended, exploratory, "make what you want of it" type games that are a little empty feeling if you're playing alone (No Man's Sky moreso, since it's expansive space instead of a limited sea map), so I'd say they're great games, but you really should play them with as many people as you can.