In case anyone did not know it, they have released the source code for Amnesia Dark Descent and Machine for Pigs:
https://www.moddb.com/games/amnesia-the-dark-descent/news/frictional-games-have-made-amnesia-the-dark-descent-open-source

So for all the budding engine writers or modders...

So early, nowhere near twenty plus years old.

With the amount of mods available for that game I thought it already was. Good for them though. I just wish they made an actual survival horror game, you know, with guns and resource managements (alla Silent Hill or classic Resident Evil). But hey, maybe now with the source some modders will do that? :D

What are the good mods and how much do they change the gameplay?