Here is the full list of all 25 Stickman Maverick : Bad Boys Killer achievements.
Kill the first bad boy
Kill 10 bad boys
Kill 50 bad boys
Kill 100 bad boys
Kill 500 bad boys
Kill 1000 bad boys
Kill 5000 bad boys
Kill 10000 bad boys
Kill 10 bosses
Kill 50 bosses
Spend 10 mins killing bad boys
Spend 30 mins killing bad boys
Spend 1 hour killing bad boys
Spend 2 hours killing bad boys
Spend 5 hours killing bad boys
Spend 10 hours killing bad boys
Reach day 5
Reach day 15
Reach day 20
Reach day 25
Reach day 30
Reach day 35
Reach day 40
Collect 10 weapons
Collect 20 weapons