Here is the full list of all 38 MORDHAU achievements.
Block 100 projectiles
Perform 20 disarms
Kill 5 enemies while climbing a ladder
Cause someone to fall to their death after kicking them
Chamber 200 attacks
Kill 5 enemies with headshots with a couched weapon on horseback
Kill 10 enemies in a row without dying
Kill an enemy with an icicle
Kill 1000 enemies
Kill an enemy with the pommel throw
Reach 1000 assists
Kill 10 enemies with the carving knife
Get 30 assists in a single match
Kill 5 enemies with the mallet
Kill an enemy with the training sword
Get 30 kills in a single match
Finish off 10 enemies with a kick
Kill 20 enemies with the ballista
Block 1000 melee attacks
Kill 30 enemies with fists
Kill 5 enemies with rocks
Land 10 headshots on enemies with projectiles in a single game
Battlecry 500 times
Kill 5 enemies with the lute
Kill 5 enemies with the bear trap
Kill 10 enemies with fire
Kill 20 enemies with the longsword
Kill an enemy while you are on fire
Take 400 damage without dying
Regenerate to full health after getting down to 1 health
Take a melee weapon out of a living enemy’s body
Decapitate 5 enemies in a single game
Kill two enemies with a single attack from a melee weapon
Kill an enemy after dying
Kill 5 enemies by trampling them with the horse
Deflect a projectile with a strike
Lose your head three times in a single match
Complete the tutorial