Commit your first assassination
Put a dog on a catapult
Kill the Bad Guy 25 times
Kill the Bad Guy 5 times as he's escaping
Spill 100 liters of blood
Get 60 passports
Finish Level Zombies!
Kill a Bodyguard
Cut off 5 heads
Finish Level DNKTBG
Make the Bad Guy run 5000 meters
Finish Level T666