An achievement called War of Worldcraft is achieved when owning at least 50 Video Game Industries.
Mass Effect – In the first mission on Eden Prime, Corporal Richard L. Jenkins dies in a cutscene because he rushes headfirst into a group of geth. (Video)
There is a hidden spot where you see a sword which looks very much like Frostmourne and has "Arthas" engraved in it. (Video)
Terraria – In patch 1.2.0, a new weapon called the Icemourne was added to the game, resembling the Frostmourne. The weapon was later replaced in a new patch to avoid copyright infringement.
In Episode 6 of Season 3, Ted says he met a girl on the internet. It is later found that he met while her playing. At the end of the episode, an in-game clip in Stranglethorn Vale show a male draenei talking to and a human female, Ted is the human female. (Video)
In Episode 19 of Season 4, Barney says "All right chums, let's do this!" then he goes out the door while yelling "Barneeey Stinsoooon!". (Video)
How to Get Away with Murder – In Episode 8 of Season 2, Philip explains that he had a hacker alert set up because other gamers have tried to steal his conquest points because he had so many. Oliver clarifies it's World of Warcraft.
Leverage – Harddisson and a mark exchange Horde solidarity in the offices of the corporate tower. (Video)
Moonlight – In the season finale Logan attempts to run a van off the road while yelling "LEEEEROY JEEEENKINS!!" (Video)
My Name is Earl – Earl jumps into an angry crowd while yelling "LEEEEROY JEEEENKINS!!" (Video)
Nikita – In Episode 2 of Season 2 "Falling Ash", when Birkhoff and Alicia are discussing computer specs, Alicia mentions that she used to work IT, and knows her way "around Azeroth".
In the pilot episode Howard Wolowitz is seen playing for a short period of time. (Video)
In Episode 4 of Season 4, Howard and Bernadette have a fight because she caught him having cybersex with a female troll under the "Bridge of Souls" (which turns out to be a male co-worker)
In Episode 19 of Season 4, Sheldon's account has been hacked, and the whole plot revolves around the incident. (Video 1, Video 2)