Far Cry 2

I got this achievement while just playing the game and doing missions but if you don't have it and your almost done with the game...

There are 9 square kilometers in the Northern Territory and 9 square kilometers in the Southern Territory. I would suggest that you start in the Northern Territory at the top right or left corner and just drive to the other side then go down a kilometer and repeat for both Territory's.

If you stuck with the UFLL in the first act or decided to subvert your missions, you should be in the clear for this act. Just make sure that, in the second act, you subvert all missions for the following achievement. There are 9 square km regions
arranged in a 3x3 square for each of the two territories.



Close to the end of your Act 2 subversions, you'll get this achievement. This is a definitive way to get the achievement.

If you want to check before proceeding to Act 2, just make sure you've entered every square kilometer of the map. There are 9 square km in a 3 km x 3 km grid. Here's a trick: Just go around the edge of the map to cover the outer 8 square km. Then hit the center. Once you enter Act 2, just work on your subversions and you'll unlock the achievements. If you want the achievement right away, repeat the trick again. Just drive around the outside of the map and then hit the center.