This achievement requires you to be the only person that escapes in that game.
For this achievement you have to make sure that noone else gets in the escape vehicle in time. To do that you can just kill everyone as a survivor (though it will be hard). Or get in and instantly start takeoff. You have a chance at just getting away with it. Oh and also they cant call for backup if you want to do this. So try and do it when the mega blizzard begins i guess.