What custom mode/mod/map/mini-game/etc. are you surprised has not been made into standalone game? – April 5, 2023 at 11:17AM

Can’t recall the mod name but I think it’s called The Hidden in COD4. One player is a freak, invisible, have a few powers and has a deadly melee attack. The other team are standard soldiers trying to kill the Hidden. It was hectic and fun.