This will be the first achievement you obtain, after the cut scenes and you are free to move your character Aurora around, while you may explore to the left of the screen nothing is yet in your reach. Keep walking to the right and you will meet the your blue partner, the Firefly named Igniculus. As you do the achievement will unlock, nothing to it!
EDIT: This achievement may not be unlocking quite the number of people, so it may be a little glitchy. There is no news as of yet as to why this is.