Fun mode: Zombie Escape is a game mode in Counter-Strike Online.
When a round started, a player will be randomly chosen as the Origin Zombie which has infinite health. The Origin zombie must infect humans to turn them into a host zombie, which has 4,000 HP. All zombies must prevent the humans from reaching the final destination, the boat, and infect them all. If the zombies reaches the boat first, they are considered as the winner of the round. The humans must escape from the zombies and head for the boat. The late humans will be left behind and died due to the explosion of bombs