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