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