Quite simple, just complete a match on all maps available for Face-Off. Can be done on Xbox Live, or on Split-Screen.
If you'd like to boost this, you either need a partner, or an extra controller.
Start it up on any map you'd like, with the following settings:
Time: 2 minutes
Enemy Density: None
Either you or your partner will need to win the match in order to complete it. For the match to be completed, someone will have to win.
To win, you'll need three round wins. So either you, or your partner, need to kill the other player at least once in each round to win the round.
Win three rounds to win the match.
It will take you approximately 7 minutes to complete a match, depending on load times.
You'll need to do this for each map in order to get the achievement.
With only 6 maps, it will take around 50 minutes to net the achievement.
Note: As long as you complete a match on each map, you'll get the achievement, you don't have to win each on each map.