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