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