Here is the full list of all 68 Tannenberg achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Switch to other team when asked for autobalance.
Win 10 games as the Central Powers.
Win 10 matches as the Entente Powers.
Kill 25 enemies with a HMG.
Become cut-off in a sector.
Cut off at least 3 enemy sectors.
Fight in every weather condition.
Win a game with a points difference of 100 or less.
Chop off someone's limbs with a sword.
Using a sword, kill an opponent who is also using a sword.
Playing as the Central Powers, capture the enemy HQ.
Playing as the Entente Powers, capture the enemy HQ.
Visit every sector in a Maneuver match.
Check out the credits screen.
Kill 3 people with a sabre in an enemy held capture zone.
Kill 4 enemies with a single grenade or call in.
As Frontovik, while crouched, get 3 grenade kills.
Get 10 kills with swords.
Kill 10 people with a heavy machine gun in a single life.
Be the first to get killed by an enemy in a game.
Unlock all specializations for the Frontovik.
Make a successful retreat
Get a kill from 150m.
Capture an enemy sector alongside 10 or more other people.
Playing as the Infanterie, win a battle in East Prussia.
Unlock all specializations for the Cossacks.
Unlock all specializations for the Roumanians
Unlock all specializations for the Latvians.
Unlock all specializations for the Bulgarians
Capture 10 enemy sectors.
Complete a match on a foggy map.
Complete a match on a snowy map.
Unlock all specializations for the Infanterie.
Unlock all specializations for the K.u.K. Trupp.
Playing as the K.u.K, lose a battle in the Carpathians.
Kill 4+ enemies in a capture zone.
Call in Artillery or Recon from a sector.
Resupply your ammo.
Kick a bot off of a heavy machine gun.
Kill an enemy soldier manning a heavy machine gun with a head shot.
Complete a match on a night map.
Issue 10 command orders.
Have a look at the overview map.
Get the first kill in a match.
Kill an enemy while shooting through an object.
Die 10 seconds after spawning.
Used voice commands 50 times.
Used voice chat.
Die from falling down.
Have your entire squad agree on a vote to change the squad name or type.
Get a kill while injured.
Perform a role switch.
Get killed by your own grenade.
Start a private match.
Exhaust all your revolver ammo without missing a shot.
Shoot an enemy while being suppressed or shaken by artillery.
Kill 5 NCO's in a match.
Kill 25 enemies with artillery as the Entente Powers.
Kill 25 enemies with artillery as the Central Powers.
Get killed by bots 50 times.
Get 7 squad spawns on a single life as NCO.
Win 25 Gold Medals.
Make 5 kills within the first two minutes of the match.
In a single life, take damage from melee attacks and gun shots from a player or players, before being killed by someone entirely different.
Get 50 artillery kills using trench phones.
Club someone to death with binoculars.
Damage two enemies with one bullet.
Be part of the top scoring squad in a match.