grenades are the best thing in this game. With cluster upgrade, thats what i did to get to level 42, i know other people said this but set the game to nightmare and leave friendly fire on. when the zombies come slip thru gaps of the wave so you dont get cornered. anyway this game needs some barricade other than that, its hell awesome. :D please plus my comment, it helps. thank you!
grenades are the best thing in this game. With cluster upgrade, thats what i did to get to level 42, i know other people said this but set the game to nightmare and leave friendly fire on. when the zombies come slip thru gaps of the wave so you dont get cornered. anyway this game needs some barricade other than that, its hell awesome. :D please plus my comment, it helps.