Here is the full list of all 27 See No Evil achievements.
Complete every level in Chapter One with no paper left on the floor
Finish chapter one
Finish chapter one with no deaths
Finish chapter two
Finish chapter three
Finish See No Evil
Finish chapter zero
Finish chapter one PLUS
Finish chapter two PLUS
Finish chapter three PLUS
Finish New Game PLUS
Finsh chapter two with no deaths
Finish chapter three with no deaths
Finish chapter four with no deaths
Finish all chapters with no deaths
Finish chapter one PLUS with no deaths
Finish chapter two PLUS with no deaths
Finish chapter three PLUS with no deaths
Finish chapter four PLUS with no deaths
Finish all PLUS chapters with no deaths
Earn all Gold and Platinum medals
Do not disturb the enemy patrolling on the puzzle in Chapter 1: Level Eleven
Shout no more than once in the foggy hedge maze in Chapter 2: Level Four
Complete the puzzle in the eleventh level of Chapter 3 without shouting
Complete the final puzzle with three shouts
Complete every level in Chapter Two with no leaves left on the floor
Complete every level in Chapter Three with no blueprints left on the floor