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