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