Before you read this, please understand, this is not leeched, this is a simple method to get past level 20+ with no glitches and I wrote it myself. Lets get crackin' You must have atleast 2 players, it's so much easier with four though. When ever I say 'south' 'north' etc, this is referring to the map at the top. Level 1 - Level 3: DO *NOT* BUY ANY GUNS OFF THE WALL! Okay, now I've emphasized that point... Run round killing the zombies till the end of round three, like you normally would. Shoot all your ammo in the first round if you like, but I would save them till the 3rd round as it takes 3 knives to kill the zombies. Let them in the take off the barriers for maximum points. With four members it's so much easier as one member has one window, and they don't move unless someone gets downed by a zombie, but this is rare. End of level 3: Each person must have atleast 2k after them 3 rounds. Open the door upstairs go through, if the box is there, great, let ONE person get something from the box, this ONE person being the one with the most amount of money, they should have atleast 1k for the MP40 later. Someone needs to open the next door, this doesn't need to be a certain person but I would make it the one with the most money. Once the door is opened, run down the stairs on the right hand side and at the bottom of the stairs on the wall is an mp40, purchase it. Kill the zombie you left if you left one, if not, kill away. Level 4: Stay in the foyer room (The room you purchased the mp40 from). Level 5: Open the door for the dressing room, this level might be the dogs, if it is get to the little corner with the dressing hangers and railings on either side of the passage way where the next door is found, don't open the door though. This makes it much harder for yourself. If it's not the dogs go all the way through to the theater/stage and then turn the power on, don't worry if you don't have enough points/money to open the stage door, you can do it on level 6. Remember to keep going back to get ammo. Level 6: if you didn't have enough money to open the door for the stage on level 5, do it now. Atleast 1 person should have enough to buy that door. Go and turn the power on, if you don't know where it is, it's located on the map above. Unless two people have $1250 each, don't open the next door. Camp (I know, the sound of the word is just disgraceful!) at the door it's possible to open next, but don't open it. Get three people to face the power and one person covering the window. If the window person isn't getting any action tell him to stay at the window for 2 seconds, look towards the stage shoot a few bullets then look back. We can't have one person getting the points and another not . Level 7: Open the next door where you've been camping, run up the stairs. If its the round of the dogs, stay in the room at the top of the stairs and go to the far side of the room, all of the players must do this. Shoot away. If it's not the round of the dogs, get someone to open the gate and run to the other side of the alley. One person covers the window and is in charge of getting a crawler (a person with half the body, can't move fast). The other three stay on the stairs and continue to shoot as many as possible, to get maximum points, keep tapping your aim and shoot buttons. By tapping your aim button this locks on to the zombies. Also forget to mention, cba to go back, put the person with the ****test gun at the barrier, this might be the person who got a gun with the box earlier. If you all have the same gun, take turns. Hopefully the perosn at the barrier got a crawler, make him stay put repairing the barrier everytime the crawler snaps off a peice of wood. The crawler cant you if you stand as far back as you cant but stil repair it. While the person at the barrier keeps the crawler there, the other 3 go to the box or go to the mp40 and get some more bullets. The box is located on the map on the wall above one of the possible positions for the box. Figure it out and head to it. If you get s*** weapons in the box, leave 1k to get some mp40 bullets. I'm not sure if I've mentioned it but when reloading next to the door on the stairs be careful, if you open the door, the full strategy is ****ed! So do not open the door! Level 8 - Level 15: Do exactly the same as Level 7 but keep switching the person at the window. Don't forget to top up the bullets of each member. Level 16+: You must all have modern guns, get rid of your mp40, get the ak located in the alley if you must. Have a crawler at the end as always. Now go to the teleporter thats in the theater. This teleporter should bring you to the projection room. You'll find the pack-a-punch upgrade kiosk in this room. Upgrade your guns and stuff the go back to doing what you did at level 7. You've guns should now be more modern than before. Shoot lasers and shinizzleee. Therefore you should get to about level 25 with this then you might get bored and think, **** it. Anyway, hope you liked my guide and are able to use it in the future. Credits to boxden.com for the image. I will not be held responsible for mistakes made and you dying. This guide does work and I have been testing it for a week. If mistakes are made, you are s***.