So I found a few easter eggs in the game, something worth laughing about.
Right now I know of 3.
In "Zero Hour" the northern part of the map a Tauren marine goes in the outhouse and takes a shit.
In "The Devils Playground" in the bottom right corner is something from Diablo, but I don't recall what he's doing.
And in "Piercing the Shroud" you find a Metroid in the tanks. (My favorite)
What did you find?