Live or Undeath
Zombies have infected the world and now the world that you once knew is forever gone. You need to keep living as that is the only choice. You need to survive till help arrive. But, that would be a long fight as help could only arrive after seven days. Survival is vital in this game, actually, that is your only choice since zombies are everywhere. You need to kill the zombies and each kill would earn you money. You can buy better guns with the money that you make, but there is no need to worry as you are just starting, you would have a gun with unlimited ammo.