Here is the full list of all 27 A Bloody Night achievements.
Get hit by a log
Kill 10 enemies
Kill an enemy
Kill a blue soldier
Kill a green soldier
Destroy 100 shields
Cut 20 rocks
Cut 20 boulders
Destroy 40 barrels
Destroy 20 explosive barrels
Destroy 4 different towers
Destroy 20 columns
Block 10 arrows
Block a boulder
Get hit 20 times by lances
Destroy 20 walls
Kill 100 enemies
Kill 1000 enemies
Kill 10000 enemies
Kill 100000 enemies
Unlock the white armor
Cut the big tree
Free the beast
Get hit by a cannon ball
Kill the gold lancer
Kill an enemy with the pendulum
Complete the game