Left for Dead: Survival Mode

Inspired by the well-known PC game. Welcome to Left for Dead - prepare to survive the zombie outbreak in this deadly zombie shooter! After an undercover science experiment went wrong, a mysterious deadly virus has broken free from a lab, infecting and turning everyone into zombies! zombie outbreak began in every country the biggest cities have become battlefields between undead monsters and the last survivals. The biggest zombie outbreak happened in the major cities - New York, London, Mexico. A few survivors, who were left for dead and not infected by the virus, had to hide in the underground subway tunnels. Your shooting mission as a zombie shooter in this action horror game battle, is to travel to those places, fight against undead zombies in the streets; protect those who got lucky to survive and deliver the blood samples to the lab for an antivirus. Now it's only you who can give humanity a chance to survive because there are so many people stranded in this left for dead situation. Ensure you and other survivals stay immune to this infectious deadly virus for this is a dead zombie shooter mission you must conquer. Only few people, are immune to the virus and their blood can be used to create a vaccine. So, while most of the survivors are hiding underground, the bravest of them are stepping outside to face zombies at the streets and make their way through to the nearest laboratories and create a vaccine. But only few people can fight off zombies running after them from every direction! In zombie action horror game like this, you must end this plague from annihilating the human race that is left for dead! Sometimes you'll be left alone in the middle of local zombie outbreak, and your mission will be just to survive there. Hordes of zombies will run at you from every direction, so keep your aim steady and try not to run out of ammo. In other missions you are sitting safely on the roof as a zombie shooter, and your mission will be to protect scientis