Here is the full list of all 33 Age of Chivalry achievements.
Get 500 kills with each class
Slay 1000 Agathians and 1000 Masons
Get 1000 kills with the Longbow
Get 200 Kills with the Longbow
Decpitate 2 opponents with 1 swing
Get 20 decapitations in one round
Get 200 kills with the Dagger
Accumulate 1000 Kills.
Kill 100 with your Warhammer.
Found the secret room!
Decapitate an opponent that is on fire
Slay 25 with throwing knives.
Kill 10 players with your hand axe.
Slay 25 with throwing axes.
Score 150 points or more on Sorrow
Torch 5 players to death in one round
Destroy the developer gravestones in Death Valley.
Get 50 kills with the Longbow
Get 10 Headshots with the Bow in one game
Kill 3 people while on the brink of death
Chop down the Tree in The Shore.
Decapitate a peasant in The Shore.
Push the bomb cart in Helms Deep.
Kill someone with an oilpot.
Kill 5 enemies without dying
Get a Headshot with the Ballista
Be mean to animals.
Push the cart on Dark Forest.
Fire the Trebuchet in The Siege.
Execute a prisoner in Dark Forest.
Headshot, Decap or Head Explodie the last person to kill you after dying.
Get the first kill in a round
Hit an opponent with a Javelin from over 100 feet away