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