Halo: Spartan Assault will soon be launching onto our Xbox 360 and Xbox One consoles. With all new co-op features and the return of the flood, Here's a break down of the achievements up for grabs on both systems.
Halo: Spartan Assault Co-op Achievements:
360
ONE
Flooded
Complete all co-op missions
30 GS
60 GS
Overachiever
Earn all co-op medals at least once
50 GS
100 GS
Dynamic Duo
Earn all Gold stars in all co-op missions
30 GS
60 GS
Extermination
Kill 10,000 enemies in co-op
30 GS
60 GS
The Company of Strangers
Complete a co-op mission with at least 5 different players
10 GS
20 GS
Halo: Spartan Assault Xbox One Exclusive Achievements:
The Enemy of my Friend
Get a higher individual score than your partner on all co-op missions
  NA  
100 GS
Immune
Finish a co-op mission without becoming infected
  NA  
100 GS
Original Halo: Spartan Assault Achievements:
Overrun
Complete Operation A
10 GS
20 GS
Switched On
Complete Operation B
10 GS
20 GS
Switched Off
Complete Operation C
10 GS
20 GS
Evacuated
Complete Operation D
10 GS
20 GS
Terminated
Complete Operation E
10 GS
20 GS
Escort Service
Keep all Wolverines intact in Operation A, Mission 3
5 GS
10 GS
Nowhere to Hide
Prevent all Jackals from regenerating their shield in Operation B, Mission 3
10 GS
20 GS
Never Knew What Hit Them
Kill a convoy target with every stationary gun in Operation C, Mission 3
10 GS
20 GS
Brute Force
Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1
10 GS
20 GS
Foot Soldier
Finish the objective without using any vehicles/turrets in Operation E, Mission 4
10 GS
20 GS
Recruit
Earn a star of any type in an operation mission
5 GS
10 GS
Prodigy
Earn your first Gold star in an operation mission
5 GS
10 GS
117
Earn all Gold stars in all operation missions
20 GS
40 GS
Distinguished Service
Earn all medals in the game at least once
15 GS
30 GS
Weapon of Choice
Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser)
5 GS
10 GS
Powered by MJOLNIR
Use every ability at least once (excluding Overshield and Seeker Drone)
10 GS
20 GS
Skull Combo
Complete any mission with the maximum number of Skulls active
10 GS
20 GS
Vidmaster Challenge
Complete Operation 5, Mission 1 with the Hollow and Black Eye Skulls active
15 GS
30 GS
Extra Credit
Complete 75 challenges
10 GS
20 GS
Pension Plan
Earn 25000 Spartan Points throughout your career
10 GS
20 GS
Archeology
Complete Operation F
10 GS
20 GS
Silvertip
Destroy all Mega Turrets with the Grizzly tank in Operation F, Mission 2
10 GS
20 GS
Vidmaster Challenge 2.0
Complete Operation F, Mission 4 with the Blind and Thunderstorm Skulls active
15 GS
30 GS

Halo: Spartan Assault will be available this December on both Xbox 360 and Xbox One.