Mark of the Ninja
38 Achievements
500
10-12h
Xbox 360
Well, I Think It's Interesting
Read one of the history lesson developer commentaries.
15
How to unlock the Well, I Think It's Interesting achievement in Mark of the Ninja - Definitive Guide
Load the mission "A Change of Course" (Mission 9) and turn left to see the commentary you'll want to hit with a dagger/your sword. That's it. It's literally the same screen you start on.