The original version of Dragon Quest 11 has been delisted from Steam to make way for a Switch port

Dragon Quest 11: Echoes of an Elusive Age was the first mainline game in the Dragon Quest series to arrive on Steam—part of a move intended to broaden its appeal in the west. It’s a traditional JRPG with, as our reviewer noted at the time, a “slightly tinny MIDI soundtrack”, though a mod that replaced it with orchestral versions of the same tracks soon appeared.

That version, the “Digital Edition of Light”, is no longer available for sale. Owners can still download it, and its Steam page still exists, though it notes, “At the request of the publisher, DRAGON QUEST® XI: Echoes of an Elusive Age™ – Digital Edition of Light is unlisted on the Steam store and will not appear in search.” 

source: gamezpot.com