The map we are going to need for the achievement farming is Reichswald.

Make sure you are alone so you could get all the kills you need and this is also to prevent the brits from advancing, if you are playing on the commonwealth side.

If you are after the German achievements, pick Reichswald entrenchment.
If you are after the British achievements, pick Reichswald stronghold.

If no servers are found playing the Reichswald map, just pick a random one and use vote to pick your desired map and game mode.

Basically what we are doing is exploiting a bug where we will be standing on a specific part on the map where you are rendered invisible and can easily pick off enemies for the easy kill. The location on the map is shown on the two screenshots below.


Under this tree, you are invisible to the enemies. Stay under the trees shadow and enemies will walk past by you. The bots are drawn to gunshots, so fire your sidearm in the air to get them close to you.


Don't go out of the trees shadow or they will spot you immediately and kill you. Basically they cant see you under the shadow, or thats what i like to interpret.

GERMAN

If you are playing on the German side, the tree is just a little south of objective A just below this small wooden bunker. Refer to the screenshot below.



BRITISH

If you are playing on the British side, the tree is just northeast of your spawnpoint, past the stone walls. Refer to the screenshot below.


While playing on the British side, your allies will attempt to cap objective A and advance. This will prevent the Germans to push forward to the bugged tree. Try to kill the capping bots to prevent the hassle of starting over again.

If you have a friend who plays DOI, you can try the boxed achivement with your friend playing as radioman. Since the bots are already packed in a small space with you, it will be easier for them to get killed by the supply boxed.

As for the flame war, draw the bots to your position and kill everyone except the flamer. Peek outside of the trees shadow to get him to fire his flamethrower and kill him with yours.

I dont think the developers will be looking to fix this bug sometime soon since they are already busy with Insurgency Sandstorm. Abuse it well until this gets fixed but i highly doubt it. I know people will say "whats the point of achieving something if you take the easy way?". As an achievement hunter myself, sometimes you've got to work smart rather than work hard.

As always, if you like my guide, rate and favorite. Happy hunting!

This guide has been translated to Turkish by Novatam
Check out his guide right here
https://gtm.you1.cn/sharedfiles/filedetails/?id=1437356855
Check out my german victory sound mod for DOI
https://gtm.you1.cn/sharedfiles/filedetails/?id=1379870815