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