Updated 04-10-2016 10:16 PM
Titanfall doesn't have a single player mode, but it has a limited campaign mode that uses it's multiplayer resources to tell a basic story revolving around a conflict between the IMC and Militia forces. To unlock this achievement you simply need to play every campaign level map as the Militia faction (Winning in not a requirement). You can check your progress from the main lobby menu by accessing Personal Stats / Levels. On the image window in the top left corner you will see the word campaign. If you have completed the campaign level on that map you will see a Militia logo under the word Campaign. If you have a win on that campaign level you will see a gold trophy next to the faction logo. Cycle through the maps to see which you still need to complete for this achievement. There are a total of nine campaign levels. Below you will find the Campaign Level Title, Game Type, and Map Name:
1) The Refuelling Raid - Hardpoint Domination on the map called Fracture
2) The Colony - Attrition on the map called Colony
3) The Odyssey - Attrition on the map called Relic
4) Get Barker - Attrition on the map called Angel City
5) Assault on the Sentinel - Attrition on the map called Outpost 207
6) Here Be Dragons - Hardpoint Domination on the map called Boneyard
7) The Three Towers - Attrition on the map called Airbase
8) The Battle of Demeter - Hardpoint Domination on the map called Demeter
9) Made Men - Hardpoint Domination on the map called Corporate