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