THIRD FIRST SIN

So is the sin first or third you ask? Both is true. If you do not know, what Occult Clockwork: First sin is, it is an Amnesia cooperation mod by Death Gods Only Eat Apples. 

Download there:
Occult Clockwork: First Sin: Chapter 3

For playing you may be required to download first chapter as well and include 3rd chapter into the full conversion mod:
Occult Clockwork: First Sin: Chapter 1