Originally Posted by Maldron
As detailed in this topic
, Companion can be earned by starting from Snow and sticking with the same person you meet there until the end of Flight. I just did that earlier, and it's a LOT less potentially frustrating than starting from the beginning.
Thanks for the info, but I'll have to verify it as the trophy itself is glitched in several ways, not just the way I detailed it. A few people (including myself) have completed the game from start to finish with the same companion and not gotten it, while others such as yourself have gotten it just by replaying the last 2 levels. Judging by the results so far, it may be tied in directly with when or if your companion would have gotten the trophy.
EDIT: Verified & added. Thanks!