if any 1 has any other tips msg back
Locksmith! 25 g
Open all doors in the map. (Map Pack 3 only)
For this one, you must open every single door on the map. There are a total of 9 doors worth a total of around 8250 points. I recommend turning one zombie into a crawler by throwing a cocktail at him, or by cooking a frag grenade and throwing it at his legs, then open all the doors you haven't opened yet.

The Might of the Monkey! 25
Use the Monkey Bomb. (Map Pack 3 only)
For this one, you just simply have to use the Monkey Bomb once. You will get it from the Mystery Box. Whenever get the Monkey Bomb from the Mystery Box you will have three Monkey Bombs. You just have to use one. To use a Monkey Bomb, you must press , you can hold it down, and you won't throw it. It's just like throwing any other special grenade, except, you know, it's a monkey.

Once you throw it, it will start making a lot of noise. It lures the zombies towards it so if you are surrounded it would be ideal to throw it then. After a few seconds, it will blow up, killing any zombies around it, remember sometimes it won't kill all the zombies surrounding it, so just be prepared. Wacker Packer! 25
Upgrade any weapon in Pack A Punch. (Map Pack 3 only)
For this achievement, you must upgrade any one weapon from the Pack A Punch machine. In order to have access to the Pack A Punch, you must link all three teleporters to the mainframe. I recommend having one person stay at the mainframe and have the others run around to the link teleporters to get the clock started. Once you have all three teleporters linked to the mainframe the Pack A Punch will be available. To upgrade a weapon, walk up to the Pack A Punch and press and hold . It costs 5000 points to upgrade a weapon. It is pricey, but it is well worth your money.

Frequent Flyer! 25
Use the teleporter 8 times. (Map Pack 3 only)
To get this one, you have to use the teleporter 8 times. It must be done in one game. It can be any of the three teleporters, whichever one you prefer. I tend to like the teleporter in the back by the bowie knife, but it's all just a matter of opinion. It costs 1500 points to use teleporter, once you do it will bring you back to the mainframe.

Any time you teleport you must press and hold , when you get to the mainframe something special will appear in front of the stairs. It could be a Max Ammo, Nuke, Carpenter, etc. I recommend saving a lot of points, around 12000 to be precise and cause a zombie to crawl. Then go to a teleporter and keep teleporting to the mainframe and walking back to the teleporter, it will take a while though. If you have over 12000 points, you will be fine.

There is also another option, it may be easier for some people. If you are in the teleporter when it is linked, you get a ride. This does count toward the eight times. So if you ride in all three of them, you would only have to do five others

40 Knives! 25
Kill 40 zombies with the bowie knife. (Map Pack 3 only)
This achievement is fairly straight forward as your goal is to kill 40 zombies with the bowie knife. Your going to need to earn 3000 points before you can pick up the knife from the weapons upgrade. Once you pick the knife up it just replaces your current knife and is used in the same way. You may want to get the Juggernaut perk just in case you get hit by a zombie, the knife will allow you to pull insta-kills on any zombies you swing at. This must be done in a single game.

Der Electrician! 25
Link all teleport pads before round 7. (Map Pack 3 only)
This isn't as hard as it sounds. It can be done on round seven but no later. There are 3 teleport pads, two are worth 1250 points and one is worth 750 points. This is probably done easiest with four people so there is a bigger combination of points to use.

Once you have enough to open all three doors, have one person stay in the mainframe while everyone else links them. You should be able to get this fairly easy without to much effort.
Acquire Waffle Weapons! 25
Obtain the Ray Gun, DG-2, and Monkey Bomb at the same time. (Map Pack 3 only)
This achievement is mostly luck based, you need to have the Ray Gun, Monkey Bomb and DG-2 in your possession at the same time. I suggest you earn a great deal of points, 20,000 should be plenty, go to the mystery box and keep paying the box until the weapons show up. You can always wait until the end of the round and leave one zombie crawling to give yourself a bit more time to cycle the box.

If you don't manage to get this the first couple of attempts keep at it while earning points.
Perkaholics Anonymous! 25
Survive until round 20 without buying a single Perk. (Map Pack 3 only)
This is the hardest achievement to earn once the waves increase in difficulty. It doesn't matter if your team mates you perks but you cannot use any. You can play the game as you would normally but you must not buy any of these perks:

•Juggernog (Juggernaut)
•Quick Revive Soda (Quick Revive)
•Speed Cola (Sleight of Hand)
•Double Tap Root Beer (Double Tap)
You can try the following methods to get through the waves or try the other two methods which follow below. These may not work for you, but you may be able to adapt them to your play style and get through the waves at your own pace.

Perk-A-Holic 3 Player Guide
Perk Addict made easy Guide
Pack Addict! 25
Upgrade 5 weapons at the Pack a Punch Machine. (Map Pack 3 only)
For this one, you must upgrade 5 weapons from the Pack A Punch machine. This must be done in one game. In order to activate the Pack A Punch you must first link all three teleporters to the mainframe. It costs 5000 points to upgrade one weapon, it will cost a total of 25,000 points to get this.

That is not including points to buy the weapon itself or to open doors. You can use one of your own methods or one of the methods described above to get enough points. You need to buy Juggernog and Speed Cola, the rest of the perks are optional.

Use the following guide to find out what the weapons upgrade to.

Pack A Punch Weapon Upgrades guide
Elevate Your Senses! 25
Activate the Fly Trap. (Map Pack 3 only)
This is an easter egg hidden in the map, take any of the guns you have and upgrade it using the Pack A Punch Machine. Any scoped weapon will make this easier but it can be done with any weapon. Upgrade the weapon and head to the left of the main area where you start and through the door. Turn left again look through the crack in the fence. You will see a panel at a distance, shoot the panel and the achievement will unlock.