According to the developers at Frictional Games, Amnesia: A Machine for Pigs wasn’t so much a true sequel as it was a spiritual successor. It seems their next game, SOMA, isn’t a sequel either, but rather a game that takes what they learned about SOMA and brings it into a much darker and twisted world.
An accompanying press release from the developers explains what we’re looking at. SOMA takes place in the PATHOS-2 research facility, a place that has lost contact with the outside world and that’s filled with machines whose “behavioral anomalies are increasingly dangerous, if not… malevolent.”
“The facility is devolving into chaos. No weapons, and the only escape is practically unthinkable,” it states.