The Starcraft II: Wings of Liberty Collector's Edition contains four avatars accessible in the Battle.net Rewards tab, Portraits section. The avatar is titled onscreen as Diablo Marine (Devoted fan).<ref> {{cite web | url = http://diablo.incgamers.com/blog/comments/sc2-ce-avatar-diablo-3-themed-space-marine/ | title = Burning D3 Space Marine | accessdate = 2010-08-13 | date = 2010-7-22 | work = Diii.net | archivedate = 2010-8-13 | quote = Fans have dug up a big block of Starcraft 2 B.net avatars, and one of them seems to be a Diablo III-themed Space Marine. ..}}</ref>

In one of the Single Player missions: Ghost of a Chance, on the planet Avernus, a laptop is found on a desktop in one building. The World of Warcraft character selection screen is displayed on a different screen, while the main screen shows a message: Want to play a game?" Various options are listed, including Diablo III:<ref> {{cite web | url = http://starcraft.incgamers.com/wiki/Easter_Eggs#Sons_of_the_Storm | title = Starcraft II Easter Eggs | accessdate = 2010-08-13 | first = Starcraft Wiki | date = 2010-8-12 | archivedate = 2010-8-13 | quote = This is the three-part mission map if you choose to help Nova Terra kill Tosh's spectres. There is a workstation with three screen monitors near the captive Ultralisks on the west side of the map. }}</ref>