Here is the full list of all 14 League of Evil achievements.
Complete 25 missions
Collect 10 briefcases
Kill 500 enemies
Collect 50 briefcases
Collect 100 briefcases
Collect all briefcases
Get three stars from 25 missions
Get three stars from 50 missions
Get three stars from 100 missions
Get three stars from all missions
Complete 50 missions
Complete 100 missions
Complete all the missions
Kill 100 enemies