Halt - his base is under quarantine, you cant leave! In the Quarantine Defender game, youre the guard, and you must prevent infected people from leaving the quarantined area. When they get too close to the fence, you are authorized to shoot them, and if they escape, you lose the game. The mouse is used to aim and shoot the people. The green bar indicates the amount of ammunition, the red bar indicates the damage to the wall, and the blue is the airstrike which kills everyone. Dont let the infected escape or youll be the big loser in Quarantine Defender.