Flooded
Complete all co-op missions
Xbox One: 60 GS
Overachiever
Earn all co-op medals at least once
Xbox One: 100 GS
Dynamic Duo
Earn all Gold stars in all co-op missions
Xbox One: 60 GS
Extermination
Kill 10,000 enemies in co-op
Xbox One: 60 GS
The Company of Strangers
Complete a co-op mission with at least 5 different players
Xbox One: 20 GS
Halo: Spartan Assault Xbox One Exklusive Achievements:
The Enemy of my Friend
Get a higher individual score than your partner on all co-op missions
100 GS
Immune
Finish a co-op mission without becoming infected
100 GS
Original Halo: Spartan Assault Achievements:
Overrun
Complete Operation A
Xbox One: 20 GS
Switched On
Complete Operation B
Xbox One: 20 GS
Switched Off
Complete Operation C
Xbox One: 20 GS
Evacuated
Complete Operation D
Xbox One: 20 GS
Terminated
Complete Operation E
Xbox One: 20 GS
Escort Service
Keep all Wolverines intact in Operation A, Mission 3
Xbox One: 10 GS
Nowhere to Hide
Prevent all Jackals from regenerating their shield in Operation B, Mission 3
Xbox One: 20 GS
Never Knew What Hit Them
Kill a convoy target with every stationary gun in Operation C, Mission 3
Xbox One: 20 GS
Brute Force
Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1
Xbox One: 20 GS
Foot Soldier
Finish the objective without using any vehicles/turrets in Operation E, Mission 4
Xbox One: 20 GS
Recruit
Earn a star of any type in an operation mission
Xbox One: 10 GS
Prodigy
Earn your first Gold star in an operation mission
Xbox One: 10 GS
117
Earn all Gold stars in all operation missions
Xbox One: 40 GS
Distinguished Service
Earn all medals in the game at least once
Xbox One: 30 GS
Weapon of Choice
Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser)
Xbox One: 10 GS
Powered by MJOLNIR
Use every ability at least once (excluding Overshield and Seeker Drone)
Xbox One: 20 GS
Skull Combo
Complete any mission with the maximum number of Skulls active
Xbox One: 20 GS
Vidmaster Challenge
Complete Operation 5, Mission 1 with the Hollow and Black Eye Skulls active
Xbox One: 30 GS
Extra Credit
Complete 75 challenges
Xbox One: 20 GS
Pension Plan
Earn 25000 Spartan Points throughout your career
Xbox One: 20 GS
Archeology
Complete Operation F
Xbox One: 20 GS
Silvertip
Destroy all Mega Turrets with the Grizzly tank in Operation F, Mission 2
Xbox One: 20 GS
Vidmaster Challenge 2.0
Complete Operation F, Mission 4 with the Blind and Thunderstorm Skulls active
Xbox One: 30 GS