Finally started playing

[Argoon]

OpenGL is a cross-platform graphics API and since Amnesia is also built for OSX and Linux it's easier to just use OpenGL. I wouldn't count on them going with DirectX anytime soon. It would be nice if they dumped OpenAL and went with something like FMOD since OpenAL has its fair share of issues and Creative doesn't seem to be supporting it any longer.

Please don't, OpenAL imo is much better sound API than FMOD for the simple reason that it supports real 3D sound (and also hardware sound acceleration) FMOD fakes 3D sound and is only software based (CPU).

If ditching openAL is even considered then they should at least try OpenAL_soft (not maintained by Creative but by the open source community) or Rapture3D (based on the last OpenAL version before Creative bought the API) this last one is really awesome because it uses binaural sound when listen with headphones (and it works right now with Amnesia because it uses OpenAL).