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