Full list of all 26 Section 8: Prejudice achievements worth 300 gamerscore.
The base game contains 20 achievements worth 200 Gamerscore, and there are 2 DLC packs containing 6 achievements worth 100 Gamerscore.
Win a ranked match in each map group in Conquest
Reach level 50 in ranked matches
Earn each Badge in ranked matches
Participate in each DCM successfully in ranked matches
Win a ranked match on Abaddon. Requires Overdrive Map Pack.
Win a ranked match on Desolation. Requires Frontier Colonies Map Pack.
Win a ranked match on Overseer. Requires Frontier Colonies Map Pack.