NOTE: You must be in game for this to count so you can't idle in the menu!

Simply play the game for the time stated in the achievement! If you don't want to actually play the game (credit to #1 to bringing this to my attention) you can spawn then pause and ALT+TAB then leave the game running. Your play time increases without actually having to play!

See: One Hour!

See: 1 hour

See: 1 Hour

While in mid air, either by jumping, using a jump pad or falling, try to use the rifle at round 2-3 to score a headshot which should instantly kill the zombie and get you the achievement.

The easiest way to do this is start a game on Abandoned Hospital and farm the initial wave for $230 then buy the jump pad and rifle. Activate the pad and fire to the left (where the zombies spawn) and through enough trial and error, you should get this one.

Play multiplayer/bots to make this much quicker and more increase the chance of reaching round 20 you can be revived!

Try not to play dumb. Your katana won't carry you to round 20 and always have a plan B (and ammo, that helps too) If you play with friends, make sure you stick somewhat close together so one of you won't bleed out.

For extra advice, please check this guide written by Omnicide.
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=560058026

These all task you with staying alive for 4 minutes on challenge mode which gives you a shotgun, grenades and kicks you out the door. Try to avoid being hit and time your reloads well as you get overwhelmed quickly in this mode. Use grenades when you need to! You get 2 for the whole game and can be a easy way out of a tight situation if used correctly.

Try upgrading your shotgun and aim for the torso with the shotgun to avoid crawlers/headless zombies. Using all points on damage allows you to kill the fat zombies in 3 shots at close range.

This Guidewritten by Okami Mecha Zu gives a better coverage on what to do since I am *insert word here* at challenge mode.

See: I Told You To Get Back!

The katana kills are easiest to get on the first few rounds and you can add a few skill points to your melee power to make this easier. The perk that allows you to start with a chainsaw will make this a breeze.

Use your melee as much as possible at early rounds and rack up the 53 kills.

The melee fighter and Steroids perk make this a breeze.
Otherwise, try to keep moving as if you get cornered, it's a tough escape with a weak melee.

Find the fridge and buy guns from it until it disappears; repeat 2 more times.

Another RNG achievement, just keep buying. Try to save about $10K then spam the fridge to increase your chances. It's best done at lower rounds since you will lose a lot of money doing this.

Play with others in order to make it easier on your in game wallet.

Buy the GiGaGirlGannon before you start the game, find the fridge or (use the powerup) and get lucky.

Make sure there are 10 zombies or more in the level then group them all together. Do this as SOON as you can as the GiGaGirlGannon becomes quite weak at later rounds and has limited ammo.

Follow the grinding method I listed for Rank 10 and don't buy doors if playing solo.

Playing bots/multiplayer makes this quick as you can spend less on opening doors and shooting less so you can save money. Just spend wisley and survive as best you can.

CHEATING METHOD:

Go to the customisation menu and click a bot's name. when prompted to change it, rename them to "imamillionare" and you'll get a popup confiming you've done it correctly. Next time you start a game on carnage, you'll have $10000 at round 1.

Right click twice at your feet on normal difficulty.

If you didn't get this on purpose... it's a long road ahead.

Keep playing, keep killing and it'll come to you naturally

Grinding drastically speeds up the process and the xplosive bullet perk can net you many kills with a single bullet as long as you can land headshots.

You're going to need a lot of cash for this one (about 15000 on solo) so the Lucky Bastard and Sponsor skills can help you out a LOT here.

Multiplayer makes this easier as you don't share money so you can spend less on opening and more on your guns.

Dishonest method: there are a few ZKW point farm maps on the Workshop if you can't manage this on the standard maps.

In 1 game (correct me if I'm wrong there) you need to shoot the legs off of 20 zombies. To do this, stand a good distance away and fire at the legs, after a while,. It'll be yours!

The auto shotgun can help out with a bigger clip and faster shooting speed but requires a fridge purchase.

EDIT: 14/8/15 - Now requires 20 zombies instead of 50

When a bot or player goes down, you'll see a red picture of their character above their body that shows where they are and that they're downed. Be the first one to get there and hold E over their body till they get back on their feet.

Upgrade the medic skill and runner if people are always beating you to the downed player

Jerk method: spam explosives at your team and revive once they down. (Don't do this against players

Aim for as many headshots as possible and you'll get this one naturally; you should be aiming for headshots anyway. Start on Mall and farm headshots until you run out of ammo then open the door, grab the rifle and hold down that area but do not open the door until you get overrun.

Buy Golden Bullets to make farming more efficient since you get 2 headshots per bullet instead of one!

You'll get this one over time; keep killing zombies. You can use turrets and x-plosive bullets to kill faster which will level you quicker but there's not a legitimate shortcut otherwise.

See: Rank 10!

EDIT: Achievement now requires getting meat 5 times in a game and not 3 times in a row.

This achievement is still luck based but is now much easier to get. The best method is to gather up as much money as possible and keep purchasing the fridge. Use the guns you get to make your money back if you're low on funds. In all, you'll need to be lucky enough to get the meat 5 times before you (and team) all die.

This is totally luck based so its difficulty really depends on you praying to RNGesus

Once you get to round 35, you'll have enountered all of the tanks. These zombies are the minibosses that appear periodically with a large ammount of health but can easily be brought down with grenades and other explosives. Otherwise, aim for the head and don't stop firing. You'll want an upgraded gun for the 3rd tank to bring him down fast! There are other zombies around too so keep that in mind - the tank deals the same melee damage as a regular zombie but it moves slower so keeping your distance and watching your back is perhaps the best way to take them down.

According to Diman (fellow ZKW:R player) having workshop maps installed can cause the last tank not to spawn and you'll have to reset your data to fix it. ONLY do this if you are sure that the last tank hasn't spawned.

The bear appears at round 15 ONLY and does no harm to you, instead, he steals a portion of your cash everytime he "hits" you until it's all gone or he dies, after which, he disappears and the game resumes as normal.

To kill him easily, back away from him and keep shooting and jump over him to avoid being cornered. If you've got meat on hand, throw it down and spam grenades till it dies. Playing multiplayer makes this much easier.

Start a bot or multiplayer game and run to the other side of the screen and don't touch anything then wait for 30 seconds

Get the flamethrower from the fridge and let the zombies burn to death.
You can also use the fridgenator (I think that's how it's spelled) and hope you're given a flamethrower to get some really easy kills on round 1 zombies
The molotov cocktail should also work.
The instant kill powerup (skull) will help you get this achievement VERY quickly

The guide has told you how to get the achievements the legitimate way but if you're just here to get 100% then download the maps and follow the steps below.

maps

https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=498521776&searchtext=mah+boomstick

https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=448016447

http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=734735383

Cheat codes

Start with $10000:

Go to the customisation menu
Change to a bot
Click their name
Enter: imamillionare as their name
You'll get a popup confirming you've done it correctly