Decline Of Humanity. A world war between the superpower of the world leads to a bio warfare that resulted in the Decline Humanity. It infected majority of the worlds population. You are a survivor, but now you’re trapped in a parking lot, with only your weapons and a lot of infected zombies are coming after you. Your goal is to survive waves of zombies to buy supplies. This game is one of the action games on Round Games. Enjoy and have fun in playing this free online game.