https://www.polygon.com/2018/5/24/17388826/dark-souls-remastered-pc-release-steam

Dark Souls: Remastered was scheduled for a May 25 release, but the game has launched a day early on Steam. If you’re interested in a rebuilt and improved version of the modern classic, you can jump right in today.

The game is not currently available on PlayStation 4 or Xbox One, so it seems as if the release date is holding for those two platforms. Dark Souls: Remastered is also coming to Nintendo Switch, sometime this summer.