It happened so quick. Aliens just dropped down from the sky and took over everything. Humanity finally met a foe that they couldn't fight. The aliens captured humans with the intent to make them their pets or lab rats. Survivors went underground, where they tried to devise plans to take earth back. Exploring the surface world was a very dangerous task. Very few wanted to be involved in this type of mission. After two decades of survival, an exploration team was sent out. Things took a deadly turn and it was now all on the shoulders of a twenty year old soldier to save his squad and get them to safety, however, fate wasn't a kind person. Earth suffered an alien invasion...what about a zombie apocalypse while we are at it? No one is safe.