Here is the full list of all 68 Tannenberg achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Kill 25 enemies with a HMG.
Unlock all specializations for the K.u.K. Trupp.
Win a game with a points difference of 100 or less.
Damage two enemies with one bullet.
Be part of the top scoring squad in a match.
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.
Kill 10 people with a heavy machine gun in a single life.
Get a kill while injured.
Kill an enemy soldier manning a heavy machine gun with a head shot.
Get 7 squad spawns on a single life as NCO.
Issue 10 command orders.
Die 10 seconds after spawning.
Complete a match on a night map.
Kill an enemy while shooting through an object.
Resupply your ammo.
Kick a bot off of a heavy machine gun.
Used voice chat.
Call in Artillery or Recon from a sector.
Kill 4+ enemies in a capture zone.
Shoot an enemy while being suppressed or shaken by artillery.
Have a look at the overview map.
Check out the credits screen.
Unlock all specializations for the Frontovik.
Unlock all specializations for the Cossacks.
Unlock all specializations for the Infanterie.
Cut off at least 3 enemy sectors.
Capture 10 enemy sectors.
Win 10 games as the Central Powers.
Win 10 matches as the Entente Powers.
Playing as the Entente Powers, capture the enemy HQ.
Playing as the Central Powers, capture the enemy HQ.
Get the first kill in a match.
Playing as the K.u.K, lose a battle in the Carpathians.
Complete a match on a snowy map.
Complete a match on a foggy map.
Get a kill from 150m.
Used voice commands 50 times.
Die from falling down.
Have your entire squad agree on a vote to change the squad name or type.
Switch to other team when asked for autobalance.
Chop off someone's limbs with a sword.
Perform a role switch.
Fight in every weather condition.
Get killed by your own grenade.
Start a private match.
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 4 enemies with a single grenade or call in.
Kill 3 people with a sabre in an enemy held capture zone.
Kill 25 enemies with artillery as the Entente Powers.
Kill 25 enemies with artillery as the Central Powers.
Get killed by bots 50 times.
Win 25 Gold Medals.
Make 5 kills within the first two minutes of the match.
As Frontovik, while crouched, get 3 grenade kills.
Get 10 kills with swords.
Get 50 artillery kills using trench phones.
Visit every sector in a Maneuver match.
Capture an enemy sector alongside 10 or more other people.
Club someone to death with binoculars.
Be the first to get killed by an enemy in a game.
Become cut-off in a sector.
Playing as the Infanterie, win a battle in East Prussia.
Unlock all specializations for the Roumanians
Unlock all specializations for the Bulgarians
Unlock all specializations for the Latvians.