Zombie Army 4: Dead War

As said in the above solution. The achievement is for mastery for 3 weapons. Not all of them.

Mastery challenges are given once a weapon has all 12 upgrades installed. Upgrade kits can be obtained as collectables in the campaign. Or given for ranking up.

Here are the 3 easiest weapons and where to get all 3 done in under an hour:

MP44- Get a kill every 2 seconds for a total of 30 kills with the MP44.
M30 DRILLING- Kill 250 zombies by dismembering limbs with the M30 Drilling.
THOMPSON- Shoot and dismember the legs of 200 zombies with the Thompson.

The level and method:

You'll want to load the level 'All roads lead to Hell'. On chapter 4 'Hitler's welcome party. I had it set to 'cadet' with '1 player' zombies.

Once the mission loads up, get the gun you want to get mastery for and make your way out the saferoom. Walk to the right where you'll see a ton of zombies just standing around waiting to be killed. You'll see a red explosive barrel. Shoot the barrel next to all the zombies which will cause a chain reaction, netting you a 30-40 combo. The explosion from the barrel will dismember a bunch of limbs giving you mastery with ease.

Once the progress bar on the left comes up for your mastery challenge. Press start and restart checkpoint. Then repeat the step of blowing up the barrel next to the zombies and you'll get your mastery in no time. Sometimes you may need to wait a minute for your progress bar to pop up.

Here is a clip of me doing the Thompson for example:


The MP44 is by far the easiest here as you only need to shoot the barrel one time and that will pop the mastery. That's if you hit over a 30+ combo.

The other 2 weapons can be done exactly the same with a few reloaded checkpoints.

The requirement for this achievo is “complete weapon mastery for 3 weapons”, not “unlock weapon mastery for ALL weapons”.

So, you will have to unlock all of the 12 upgrades, and also complete the mastery task for any 3 weapons of your choosing.

The 12 upgrades are quite straight forward: play the campaign and collect upgrade crates. Upgrade crates are gained by levelling up too, and also for earning a gold medal on a chapter/level (given for getting a high enough score on that chapter/level).

The mastery tasks are more tricky, and are all variations on “kill a certain number of enemies in a certain manner”. They are made easier by the fact that you can restart a checkpoint, or restart a safe room, and you will keep your kill tally, so they can all be farmed relatively simply.

The mastery task itself does not reveal itself to you until you have unlocked all 12 upgrades for that weapon. But do not fret, here they are for all the base game weapons:

Gewehr - kill 10 snipers through their scope

M1 garand - kill 100 heavies, officers or blind screamers by shooting their weak spots

Mosin nagant M91/30 - get 200 headshot kills from over 50m

M30 drilling - kill 250 zombies by dismembering limbs

MP44 - get a kill every 2 seconds for a total of 30 kills

Thompson - shoot and dismember the legs of 200 zombies

Trench Gun - get 200 triple kills or above

C96 pistol - get 200 ricochet kills

M1911 - get 200 headshot kills

Webley MKVI - get 200 double kills or above


Here is where I farmed some of the mastery kills:

Gewehr rifle. DEATH CANAL “Carnivorous Canal Cruise” where you first meet snipers in the game, at the point where the boat stops and you have to refuel the boat. Easy difficulty. Be patient. By the time you have done a few, it will seem much easier: Kill a sniper through their scope, and RESTART checkpoint. Repeat as necessary.

Trench-gun, webley pistol, MP44 machine gun all farmed at the same place: DEAD AHEAD ”Locomotive Lockdown”. Go through the safe house gate, climb up, go through the next gate, skip the cutscene, and, whilst on the sloping gangway, try to get some multikills until almost all the zombies are gone (before the next checkpoint ), and reload checkpoint. Easy difficulty with enemy number set at “4 players”.

Achievement will pop when your 3rd weapon has had it’s skill mastery mastered!