Wizard 101 is an online multiplayer game that was created in 2008 by Kingslsle Entertainment. It briefly incorporates takes on characters from Oz into two of its quests that take place in an area of "Wizard City" called Unicorn Way that has a road of Yellow Bricks.
Quest: Yellow Brick Road:
Given by a Private Connelly to check on Dorothy Gale, a wizard attending Ravenwood.
Quest: Not In Kansas Anymore