The earth is not what it used to be. The aliens came in endless waves and destroyed the planet. They changed the entire ecosystem, and the air became poisonous for humans and animals. Abducted humans were brainwashed and turned against their own kind. They were responsible for dropping nuclear bombs all over the planet. In Earth Taken 3, you are one of these captured prisoners, and the aliens are turn you into a mindless soldier by brainwashing you. Your only goal is to escape.