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2013Developed by 343 Industries / Vanguard Entertainment

Enlist as a Spartan soldier and sharpen your tactical skills in battle! Set between the events of Halo 3 and Halo 4, Halo: Spartan Assault, developed by 343 Industries in conjunction with Vanguard Games, is a new chapter within the award-winning Halo universe. Spanning over 30 missions in vibrant, dangerous worlds, dive deeper into the backstory of Human-Covenant wars and the origins of the Spartan Ops program.
Outer Shell
Complete all missions in Operation C with the Hollow Skull active
Ballistic Backfire
Complete all missions in Operation B with the Pacifist Skull active
Running Low
Complete all missions in Operation E with the Famine Skull active
Dark Clouds
Complete all missions in Operation F with the Thunderstorm Skull active
Melee Madness
Complete all missions in Operation A with the Black Eye Skull active
Wild Guess
Complete all missions in Operation D with the Blind Skull active
Extermination
Kill 10,000 enemies in co-op
Overachiever
Earn all co-op medals at least once
The Company of Strangers
Complete a co-op mission with at least 5 different players
The Enemy of my Friend
Get a higher individual score than your partner on all co-op missions