Kill Ping: “With Halloween just a few days away, Valve is here with a brand new Counter-Strike: Global Offensive Update, one which celebrates this upcoming spooky event. And since Halloween is all about ghosts and other scary things, the update features not only your usual map changes and balances but also some additional features which might freak you out as well. They say this, cause Ghosts are coming to CS:GO”.
Source: N4G PC CS:GO Halloween Update: Zombie Chickens, Ghosts And More