You can download the source code for both The Dark Descent and its sequel, A Machine for Pigs (which itself started out as a mod), through GitHub.Īs series developer Frictional Games points out, the annoucement doesn't mean you can get the two titles for free. A little after its tenth anniversary, Amnesia: The Dark Descent is now open-source, allowing modders and aspiring game developers to delve into the title's codebase to see how the horror masterpiece was created.