Here is the full list of all 50 Kill The Bad Guy achievements.
Spend 35 hours playing the game
Make the Bad Guy run 5000 meters
Kill the Bad Guy 250 times
Associate 1000 items
Make the Bad Guy watch 50 movies
Cut off 15 heads
Cut off 5 heads
Kill 5 cops
Kill 25 innocent bystanders
Cut off 50 legs
Make the Bad Guy read 50 magazines
Dismember the Bad Guy 50 times
Broadcast a game on Twitch TV
Share one image on Facebook
Get 396 stars
Finish Level T666
Kill 10 Bodyguards
Kill the Bad Guy 35 times as he's escaping
Spill 500 liters of blood
Kill 5 Bodyguards
Kill a Bodyguard
Kill 10 innocent bystanders
Kill the Bad Guy 25 times on the same level
Make a pedestrian stop in front of a porn item 25 times
Fling the Bad Guy 1000 meters away
Make the Bad Guy run away 25 times
Fail 50 times
Get 60 teeth
Cut off 10 legs
Finish Level DNKTBG
Kill the Bad Guy 50 times
Associate 100 items
Finish Level Zombies!
Spend 2 hours playing the game
Get 60 passports
Make the Bad Guy run away 10 times
Kill the Bad Guy 5 times as he's escaping
Keep hold of the ball for 5 seconds
Kill the Bad Guy over several days
Spill 100 liters of blood
Kill the Bad Guy 5 times on the same level
Kill the Bad Guy 25 times
Fail 10 times
Kill one innocent bystander
Kill one cop
Put a dog on a catapult
Make the Bad Guy run away for the first time
Kill the Bad Guy in one day
Commit your first assassination
Start the game