Disclaimer: I do not own Call of Duty or anything of the such!
Chapter 1: Chemical Z
Being a scientist is kind of boring. All you do is wait for more chemicals to come in so you can mess with it, and some times this may take years. Luckily, a new chemical has come in. No one knows what it does. So we decide to test. First, we get a bunch of hamsters in this little enclosed space, and have cameras watching. We inject this new chemical, which we have called chemical 85349 for now. We watch the hamsters, but nothing happens for a long time. It got late, so we decided to let the camera do the work. In the morning, we come to find the hamsters all dead, and a doctor told us they killed each other, trying to eat each other. We went to the cameras, but only to find them destroyed, and the film burned. So we tweaked up the chemical. The same process happened, only the messes got worst. Soon, we tested it on other animals, apes, dogs, etc. The process got better and better. Once we found one ape, after an experiment, alive. It seemed normal, only dumber, and slower. Its reflexes were horrible. We ended his misery. After months of testing, we decided we couldn't get a better result. So, we went to humans.
We got a group of people, who we would pay, and put them in a closed room. The same effect. We messed up the chemical more. The people got physically stronger, but soon died. One idle scientist walked in the room to clean up. He was holding a vile of it. He tripped, and it got over one of the bodies. That person got up, and was alive! We did the same to all of the people, each with the same result. We released them soon after. Our scientists thought we have figured out eternal life! We just needed a person to try drinking it, to see if it would expand their life. We send out scientists and workers down to the near town to advertise, but they never returned. We e-mailed, mailed, and send in more people. Non-returned. We got worried. Soon, a few people never showed up to work. We got all the weaponry we had, and blockaded ourselves in the lab. We were such fools. They came. In swarms! We knew we would soon die. We couldn't last. We will now die.