I used to play Crossfire which had a ghost game mode which was really fun as a casual game and it triggered my memory when I saw the 'CS2 Online' thumbnail on Twitch which looked like it had a ghost on it. Anywhooo it was quite fun and I'd like to see Valve try to do it for a casual Halloween mode.

For anyone not familiar with this game mode. There is one player who is a ghost who is invisible if they walk slowly or stood still. The ghost only has a knife. The ghost has to knife other players in order to turn them into a ghostsl. If there is a non-ghost living at the end of the timer then the non-ghosts win. At least that's how I remember the game mode to be.