Complete Mission 4 on any difficulty. - Halo Wars: Definitive Edition
Complete Mission 3 on any difficulty. - Halo Wars: Definitive Edition
Collect your first Skull. - Halo Wars: Definitive Edition
54/4,98245/1,5005/75
100/11,09990/3,6109/178
31/3,75830/1,0002/51