Nightdive Studios (they, among other titles, remastered System Shock, which has received pretty good reviews) wanted to remaster Eternal Darkness, but Nintendo - who owns Eternal Darkness - doesn't want that to happen.
Also, the original developers of Eternal Darkness want to create a spiritual sequel, but that seems to be... an eternal project. Check out Shadow of the Eternals, if you want to follow that project. There's a gameplay video from like 2013 or 2014.
When you see something traumatic, your brain will over the next few hours create images of the traumatic event. These images will come back to you as flashbacks over the years. Playing a game that requires high focus on visual details prevents the brain from creating those images, and as a result you'll get less (or not at all) flashbacks after the traumatic event.