Battle for the Pacific

You will need to boost this achievement, as no one plays this game online. Luckily, this can be done in Player matches with only two people.

Set up a Player match, game type Elimination, on the map Headquarters with a 1 kill limit and 1 life limit. The map is very small and circular, so have both players run to the open area in the center of the map. Have one player kill the other player and the match will end. At the summary screen, simply press the A button to start the next match.

Rinse and repeat nine more times to unlock the achievement at the end of the tenth match. Takes about 5-7 minutes including loading times.

EDIT: Thanks to https://www.trueachievements.com/Darkened+Night.htm for adding that you can make this go even faster by having one player throw a grenade at their feet and commit suicide. Sweet!

Set up a player match of elimination with 1 kill limit and 1 life limit to help this go faster then simply kill the other opponent to win the match this can be done with only two people in the match. It is boostable