Here is the full list of all 100 Crimen - there are Mercenary Tales achievements.
Killed a Tank
Killed 10 Tanks
Killed 25 Tanks
Killed 10 Fencers
Killed 50 Fencers
Killed 100 Fencers
Killed 500 Fencers
Killed 10 Archers
Killed 50 Archers
Killed 100 Archers
Killed an enemy immediately after blocking
Deflected 5 arrows back to Archers
Deflected 10 arrows back to Archers
Deflected 30 arrows back to Archers
Killed an enemy by throwing an object at them
Killed an enemy by throwing a fruit at them
Shot from two pistols at once
Killed 5 enemies with a gun
Killed 15 enemies with a gun
Killed 30 enemies with a gun
Killed 5 enemies with a bow
Killed 15 enemies with a bow
Killed 30 enemies with a bow
Blocked attacks from 2 enemies at once
Killed an enemy with a destructible weapon
Killed 5 enemies with a destructible weapon
Killed 10 enemies with a destructible weapon
Killed 10 enemies with exploding barrels
Hit three enemies with one boomerang
Kill Tank using a wand
In the options, set the Vignette level to maximum
Completed Boy's story
Killed all the Chickens in the Boy's story
Hit all the Chicken Drawings on the dart board
Found the donkey in three minutes
Slapped the donkey
Throw item into the well
Completed Anton Mamay's story
Didn't make any mistake when playing the organs
Woke up Lady Bathory
Didn't get hit by any of the vampire's orbs in the last fight
Killed 5 werewolves with a gun
Solved the summoning ritual puzzle
Switch Subtitles settings in options
Completed Anna Boniecka's story
Killed 10 Skeletons
Didn't open the chest
Tried to shoot the parrot
Got to the top of the temple without dying
Killed all the beetles
Didn't hit any armour on skeletons
Completed Karol Lewandowski's story
Picked up all the loot in the Niedzica castle
Defeated Lord Dunin without getting any damage
Finish combat at Niedzica slashing enemies only horizontally
Got caught by Lord Dunin
Opened all the doors in the food storage room
Opened all wardrobes in the bedroom
Completed Al Mansur's story
Shot Bal Dudak with the handmortar
Killed 3 enemies with one handmortal shot
Defeated Bal Dudak in close combat
Used hanging environment to kill 3 enemies
Destroy every jugs from the stall at baazar
Completed Al Mansur's story without using any throwable objectives
Completed Captain Alonso Fernández de Avellaneda's story
Survived the ambush in the sewers
Climbed the tower in 2 minutes
Finish one fight using only bow and arrows in Captain Alonso Fernández de Avellaneda's story
Kill a tank with a wand in Captain Alonso Fernández de Avellaneda's story
Completed Jacek Dydyński's story
Deflected all arrows when ziplining
Deflected all the objects thrown by the old lady
Finish combat in Lubovna without slashing enemies horizontally.
Complete Boy's story three times
Completed Baba Yaga's story
Followed the recipe perfectly
Spoiled the stew
Deflected all missiles during the cottage fight
Opened 5 locks
Drunk a healing potion
Completed the game
Died 5 times on a level
Shot every cannon in the game
Completed any level without getting damaged
In the game settings, change the current language to a different one
Died by falling when climbing
Throw a bucket over Fencer's head and see what happens
Paused the game 30 times on a level
Die in a Boy's story, which is a tutorial level...
Finish game on lowest difficulty
Finish game on highest difficulty
Watch the whole credits sequence
Killed 10 enemies by throwing an object at them
Killed 25 enemies by throwing an object at them
Killed 50 enemies with a gun
Killed 50 enemies with a bow
Stunned 30 enemies
Stun Tank with pan in Jacek Dydyński's story
Stun 5 enemies using flash grenade at once