One fan did and thought that a great way to remember Williams would be to add him into World of Warcraft as an NPC. Thus he started a Change.org petition earlier today to do just that. With over 10,000 signatures added since then, the movement apparently caught the attention of Blizzard. "An amazing development has just happened," the petition author added in an update. "Celestalon has seen the petition and has been quoted as saying, 'We're taking care of it.'"
Robin Williams is being memorialized in other MMOs as well. One player took the above screenshot from APB, noting how a fellow gamer created and uploaded the in-game poster as a tribute to the man.
[Update: The official WoW Twitter account just tweeted, ".@robinwilliams Thank you. You gave us so much joy in our lives, and we hope you enjoyed your time in our world. We'll see you in-game."]