Here is the full list of all 9 tiny & Tall: Gleipnir Episode One achievements.
You provided some unsolicited cheese to a hungry rodent.
You finished the game without asking for clues.
Your interpersonal skills are the stuff of legends.
A first step towards saving the world!
No sheet gets past you.
You finished the game either without using the snoop feature, or by using it a very reasonable amount of times.
You finished the game without ever asking for the solution.
You've spilled oil on the ground. There's nothing to be proud of.
He might have been an obnoxious self-help writer, but you respected his will nonetheless.