Complete the indicated task to unlock the achievement.

Achievement	How to unlock
BUTCHER	Complete a level using only a knife.
EXECUTION	You executed the prisoner.
MISSION 10	Complete the tenth mission.
MISSION 11	Complete the eleventh mission.
MISSION 12	Complete the twelfth mission.
MISSION 13	Complete the thirteenth mission.
MISSION 14	Complete the fourteenth mission.
MISSION 15	Complete the fifteenth mission.
MISSION 1	Complete the first mission.
MISSION 2	Complete the second mission.
MISSION 3	Complete the third mission.
MISSION 4	Complete the fourth mission.
MISSION 5	Complete the fifth mission.
MISSION 6	Complete the sixth mission.
MISSION 7	Complete the seventh mission.
MISSION 8	Complete the eighth mission.
MISSION 9	Complete the ninth mission.
SHARPSHOOTER	Complete a level using guns only.
THE END	Complete the game.