As far as we know, prey will not be added into Feral-heart, even if we wanted it to. Since we don't have the source code, we cannot change or update the game itself. The only changes that can be made into the actual game include modifications and animations that other users create and put up for other people to self-download.
This topic was created in 2012, the last comment was in 2013, and this has already been thoroughly dicussed, so I will be locking this. Please check the date of the thread before posting again.