Under rating threshold (hideshow)
Of all the Boxhead series this is my absolute favorite, and one I come back to from time to time for its arcade-style gameplay. The newest ones have more monsters and weapons, sure, but I don't get awesome until-death upgrades on my weapons for taking out a load of enemies quickly.
Under rating threshold (hideshow)
easy to do it. just put walls by the one entrance, move to the other and spam grenades. pick up the boxes that dead drop carefuly (if you don't have many granades left) and continue untill you're at 42 lvl
Under rating threshold (hideshow)
this should help you, when you get a frcken croud of zombies... just throw all of your grenades everywhere and kill them all, also you should get a great combo ;0
Under rating threshold (hideshow)
Here's how I got it by myself. I first selected nightmare difficulty, turned off the devils, object collision, and friendly fire. I used the Boxy map. In the first level, if the zombies just flood in and you can't control the flow, use your grenades and rockets BUT LEAVE THE LAST ZOMBIE!!! When you see the crowd shorted, start using the uzi or the pistol. When that's good, block up on of the entrances with fake walls and put one wall to block part of the other entrance. Put a line of walls one space down or up from the entrance in any direction. You should have no/almost no walls now. Then kill the zombie and camp on the end of your line of walls. You can also use a pistol!!! Well, this is how I got the achievement, it might be slow but reliable!!