Have your special-duty soldier kill three enemies in the same mission - XCOM: Enemy Within
Designate a highly decorated soldier as the Volunteer - XCOM: Enemy Within
Kill an unseen enemy detected by a specially modified soldier in single player - XCOM: Enemy Within
1,342/1,850820/1,00027/30
2,493/2,4931,550/1,55072/72
1,683/2,226920/1,20040/49
