Here is the full list of all 25 Hooligan Vasja achievements.
Manage to die while medikit is nearby
Break off a balcony from the wall
Defeat the Clownboss
Kill 25 clowns
Restore 1000 HP
Kill 50 cooks
Kill 5 enemies with one firecracker
Kill 125 neighbors
Kill 500 grannies
Defeat the Ratboss
Kill 250 gramps
Kill any boss with the last bullet
Defeat the Trollboss
Hit 50 cats jumping upon Vasja
Kill 4 enemies with one firecracker
Defeat the Dogboss
Kill 3 enemies with one firecracker
Finish a level without incurring any damage
Use a firecracker
Kill 5 enemies with 5 bullets
Defeat the Catboss
Do not let a pigeon to be killed
Kill an enemy with falling balcony
Participated in a battle