StarCraft
The Wolfram Alpha website has commands that let users plot graphs specifically designed to look like a zergling, hydralisk and protoss.
Contributed by Psychospacecow
For April Fools in 2010, Blizzard announced a game called Queen's Quest, a text-based game starring the Queen of Blades, as an overt parody of King's Quest.
One of the mock-up images also featured an owl called Schmendrick, a reference to Cedric the Owl, also from King's Quest.
Contributed by Psychospacecow
Artanis's name is a clear reference to singer Frank Sinatra, simply being "Sinatra" spelled backwards.
Contributed by Psychospacecow
The cancelled "Starcraft: Ghost" game spawned a series of novels based around it, and some of the elements from its story found their way into Starcraft II.
Contributed by Psychospacecow