Well what can I say...

I made a Mindmap for all paths and endings in the game so you don't have to.

Just follow the path in the Mindmap to get to a specific achievement.

The Achievement "Retribution" will be unlocked my choosing the "True Ending" in the Main Menu.

If you want to speed things up you can force close the game every time you got an achievement skipping the end text.

Have fun