The Hacker is an unknown victim that has the ability to take over the life of other agents.
One night when Agent Unknown was sleeping, the hacker possessed him and started destroying, vandalising and attacking other agents in the Robber Penguin Agency HQ.
The next day Agent Unknown woke up and went to the HQ to find out that everything had been destroyed. He started to panic and admitted that wasn't really him. Agent Omega X decided that every agency should team up and catch the hacker before it's too late. As he could destroy every agency in the world.