mrkgnao: I don't have the game, but based on the game page reviews, the GOG version of
Heavy Rain does not support controllers --- which are pretty much essential for the game --- whereas the steam and epic versions do.
Blackdrazon: Oh man, this one's
wild. The people at
the forums have been talking about it. The conclusion seems to be: Quantic Dreams made a version that does work with PC, which they sent to Epic, but then they made a Steam version relies on Steam controller support, and
removed other support methods, and then gave GOG
that version.
Someone said the game will work if you add it to Steam as a "Non-Steam Game," but Steam Contorller support can be set to work in any game so long as Steam is running, so I imagine that would work too. Can't say for sure, mind you, I don't have the game.
Here's the really fun part: controller is working the moment you use the exe from Epic. So why they did not give this one to GOG beats me. Maybe because the controller support is not working perfectly on Steam as well according to pcgw?