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