Dunno if this movie has a thread yet, I really enjoyed it.
The beginning was the best, it reminded me of a videogame plot(in a good way) as the hero awakes with amnesia in a dark pit and the film is gripping and silent for a good while. He explores a mysterious underground facility, finding errant clues and destruction.
I may have become distracted near the end and missed some exposition, I need to do a rewatch but I would not expect elaborate answers.