I am a creator on hpl2 Game Engine, means you can play my mods in Amnesia the dark descent as a custom story.
But do not expect a horror game like Amnesia itself. My Mod is more a JRPG with Persona elements.
Download here: https://www.nexusmods.com/amnesia/mods/6
(klick on Download Manual to download the zip of the Game)
unzip the archive into your custom_stories folder in the main Amnesia directory and start the mod from game menue section Custom Story — enjoy 