We’ll be able to make new quests, new characters, even whole new worlds.
I am very excited to see what players might create.
The Witcher 3’s had mods for years, of course.

REDkit should let people make whole new giant things, and more easily.
CD Projekt say they’ll be granting access in batches, so you may have to wait awhile.
REDkit won’t be limited to Steam once it officially launches, of course.
