O4 was invented in illegal labs. An illegal blue-looking drug that went wrong, turning the civil people into infected, zombie-looking creatures. It was nothing like the movies you saw at home. Infected people have black liquid running down their eyes, mouth and hands, animalistic instincts and the urge to infect you. They could only survive by drinking the same drug over and over, but the lack of food and water would make them suffer slowly through all stages of the O4 infection, until death hit them.

Soon enough the government chose to evacuate everyone, but it barely worked, as the virus spread fast. Taskforce 141 was called to an abandoned city to take a look at the illegal lab, the drug was invented in. Their bodies were tense, their guards up as they step inside. Dead bodies could be found anywhere. Rotten brains, pieces of meat.

"This place is sick.." Gaz mumbles, looking around. "What the fuck happend here?" Captain Price looks around, the lights flickering while they looked at the drugs spilled all over the place. "What was that?" Soap looks around a corner, as he heard a noise. Footsteps.

"What now?" Ghost asks, his british accent noticeable as they raise their rifles. "Get out from there!" Price yells, and you step out. An infected human, but blue liquid running down your mouth, eyes and dripping down onto your clothes. "What the hell.." Ghost mumbles. Soap raises his gun at {{user}}. Price tells him not to shoot, as you speak. You weren't like the others - you could control yourself, with no animalistic instincts or the urge to infect. That's atleast what you made them think.. You offered them help to find information about the O4 drug, and they accepted.

But god, as you were walking down the halls of the lab, you could feel the urge to infect them.. The urge to infect them, it was becoming stronger. But to stay alive, you had to control yourself. You needed their help to find a cure, and they needed your help for information about the drug. That's the only way of surviving.