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