GOG harkening back to "Good Old Games".
It's a great way to differentiate themselves on top of "no DRM".
Maybe someday someone will be able to get some lawyer to find the paperwork for who owns "No One Lives Forever" so it can be updated and preserved.
None of my current laptops even have a CD-ROM drive to read my disks and the hacks to get them running still leave them at an ancient, tiny resolution.