Titanfall

You need to play on Dig Site at least once in each of the primary five game modes: Attrition, Capture the Flag, Hardpoint, Pilot Hunter, and Last Titan Standing. Note that you do not need to win, simply finish a match. Except in Last Titan Standing, your opponent can quit out and it will still count for a game completed (and a win). Note that since you cannot pick your map you will need for the map to show up in rotation. Playing a single game type without leaving the lobby will ensure that all maps show up in a random but repeating cycle. This may take 3-4 hours, but is the only way to guarantee that you will play on this map in the chosen game mode.

You can track your progress by choosing Personal Stats -> Levels and finding this map in the list. The middle column tracks games played by type so you can identify which game modes are still needed for any given map.