why its 4stars

I give it a 4 out of 5 because it is 1 of the best aps Ive ever played but the reason I didnt give it a 5 was because when a zombie was right infront the turret it just wont shoot none of them but it Is still 1 of the best games I e ever played

Brett kuni about BioDefense: Zombie Outbreak, v2.0