Here is the full list of all 22 PiiSim achievements.
Destroy 100 Objects
Destroy 500 Objects
Destroy 2000 Objects
Destroy 5000 Objects
Destroy 10,000 Objects
Complete LVL I
Complete LVL II
Complete LVL III
Complete LVL IV
Destroy 10 police automobile
Destroy 100 police automobile
Destroy 1000 police automobile
Turn the lights off
Destroy cam in main room
Be first among your friends, in score tab
Complete LVL V
Shoot down 10 tank shells
shoot down a fighter
Destroy scholl bus
Lose with having zero score
Complete LVL 1 for 60 seconds