oh man i have been waiting for a thread like this, on the new zombies the best strategy by far if you alone is to get the mp40 in the later rounds after u have acquired monkey bombs, the zeus canon, you hold off in the theatre the start of the rounds and filter all the zombies into that area, you may have to use ur zeus cannon to clear a path but head to the main lobby and filter them in and keep shooting rackign up the points and keep moving, like i said may have to blast a clear path but the more rounds you do this the easier it will be to get used to filtering them.
You can keep buying ammo for the mp 40 in the speed cola room after a couple of laps as u run out accordingly, dont upgrade as the ammo is expensive and the gun is not as lethal i nthe later rounds anyways, just used for points really, activate traps, etc; try not to use your perks such as bombs, insta kills etc, because the less u use them the more u will get in the later rounds if your desperate, when the hounds come if it seems like to much and u have alot of points and dont want to risk it hit the gun turrent in the theatre and it will take care of the dogs in about 5 seconds, even at round 32- i made it to 33 alone and could of kept going but this was almost two hours into playing and i didnt expect to get so far so i had to go to bed for work.
If your playing with friends its best to hold off in the alley up in the room with 2 windows and the staircase, hold off there as long as possible and when u get overrun depending on how many ppl u have playing u should be set to start the laps around the game with ur awesome guns, alot harder with that many people as there are 4 x as much zombies, anyways thats my input, worked for me, huge zombie fan, dunno why the stats online dont count for solo, pretty shitty.
Dont realy like the second pentagon level.
on the World at war map Der Riese me and my buddy made it to round 40 just the 2 of us, dnt ask how it was unreal, it took 3 hours to do it and i left my girlfriend waiting at work for an hour afterwards she was not happy lol but we just kept teleporting hitting traps and running after round 30 the rounds were ten minutes long so it took an hour and a half from rounds 30-40 definetly not expecting to last that long after round 34 we were determined to get to 40 even at round forty we didnt go down without a fight no ammo for guns only our knives it was intense