Lost Odyssey

Story related - you will obtain this upon Kaim recalling his first 'dream'

You don't have to watch the dream, simply running through the story will get you this achievement.

You will get this achievement roughly one hour into playing the game. Once you reach your first town you will eventually be asked to stay the night at an inn. Once at the inn, speak to the owner behind a counter and he will tell you that he was expecting you and then it will go to a cut scene. After the cut scene is over, you will unlock the first dream episode, which is basically a lost memory from Kaim's past. Simply go through the story pressing A when prompted and once the story is over the achievement will unlock. This is story related so you cannot miss it.