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