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The Rex Research Institute completed successful experiments to find a new antibody and reversal formula for the Rex virus for the zombies to be controlled.
Due to a failed experiment he had turned into a zombie himself, but he still behaved like a human.
He wants to take revenge on the government that had forsaken him by combining his zombie army forces with the Terrorists.
- This map was not released in Singapore/Malaysia version (Zombie: The Union is not available there).
- For Vietnam region and Counter-Strike Nexon: Zombies, this map is only available for Zombie 1: Original, Zombie 2: Mutation and Zombie 3: Hero.
- There are some same parts of this map in Italy from Counter-Strike Online 2.