Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Polite Conversation	Completed Optional 2.
Algorithmic Composition	Completed Optional 4.
Boolean Logic	Completed Optional 6.
Chapter Five	Completed Chapter Five.
Chapter Four	Completed Chapter Four.
Chapter One	Completed Chapter One.
Chapter Seven	Completed Chapter Seven.
Chapter Six	Completed Chapter Six.
Chapter Three	Completed Chapter Three.
Chapter Two	Completed Chapter Two.
Game Complete	Completed The Game.
The Chinese Room	Completed Optional 5.
The Universe's Machine Epsilon	Completed Optional 3.
Thinking Outside of the Box	Completed Optional 7.
This is a Lock	Completed Optional 1.