Here is the full list of all 27 Hooligan Vasja: Christmas achievements.
Kill any boss with the last bullet
Defeat Krampus
Chase away 15 daemons
Chase away 25 trolls
Throw 300 presents
Defeat Zwarte Piet
Chase away 75 ghosts
Finish a level without incurring any damage
Hit 50 cats jumping upon Vasja
Chase away 125 straw scarecrows
Throw 200 presents
Chase away 250 goblins
Restore 1000 HP
Kill an enemy with falling balcony
Break off a balcony from the wall
Defeat Babay
Throw 100 presents
Kill 5 enemies with one firecracker
Do not let a bird to be killed
Kill 5 enemies with 5 bullets
Defeat Hans Trapp
Kill 4 enemies with one firecracker
Defeat Gryla
Manage to die while medikit is nearby
Kill 3 enemies with one firecracker
Use a firecracker
Start playing game in Christmas mode