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