In this game, you take the role of Lt Conner "Killjoy" McMillan. You've taken command of a platoon of four ICS, or Infection Contamination Squads. You're leading a convoy towards Horse Island, a safe-zone. The Convoy consists of, from front to back, a Humvee, a Stryker, three armored vans for transporting civilians, a truck and another Humvee. Your objectives are to get the civilians to the safe-zone at any costs. If possible, other supplies and survivors would be a benefit. More Kills lead to more experienced soldiers and a better chance of survival.