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