I Killed Them All
To unlock this achievement you must kill ALL (Minimum of 1 person) enemy pilots upon evacuation. The losing team is the team who has to evacuate by getting to the given location (Losing team cannot achieve this achievement at the end of the match). This can be quite hard but, I have a couple of methods on how to unlock this achievement.
I know a lot of people are posting that they want to boost in my comments, but this website has a boosting session category that people will meet up and work towards this achievement. I joined the first boosting session for this game and got this achievement first attempt.
Follow my guide and unlock the achievement for yourself!
I was playing with a friend who got this and she destroyed the evacuation ship. If you are with a group of 6 people you can always work together to have 1 person get the achievement by letting them get all the kill and being decoys and assisting in a titan. Just make sure to let that 1 person who's getting the achievement destroy the Evacuation ship. (Note: You do not need to kill 6 people, if there is any more than less on the enemy team when the evacuation starts, as long as you kill those pilots, you will get the achievement, I would recommend playing late at night on a week day to have this possibility)
An even better method of running into less people is by changing your server in the menu, the less people on the server the higher the chances you run into a game with much fewer people. FOR INSTANCE if you find a game with 2v2 on a different server your chances of obtaining this achievement have greatly increased.
Don't be discouraged about getting this achievement, eventually if you try hard enough you will get it, luck must be on your side, keep looking for games with few people and try having friends help you out. If you keep playing with few people and friends at your side assisting you, you will get this achievement!Boosting Method:
To the best of luck for everyone going for this achievement, any questions or concerns please comment or message me.
Video: Those to who that don't want to boost here is a great video by Cog Incorparated.