Chapters 14-Epilogue (Normal)

Chapters 14-Epilogue (Normal) is a secret achievement in the first Bayonetta game that is unlocked by completing Chapters 12 and 13 on Normal.

Description
"Complete Chapters 14 through the Epilogue on Normal Difficulty"

Guide
Just beat Chapters 14, 15, 16 and the Epilogue on Normal.

Here is the wiki Walkthrough:

Chapter 14

Chapter 15

Chapter 16

Epilogue