In the comic “Kingdom Come” two characters are walking past a book store, I believe Norman McCay is one of them, in the bookstore window is a copy of “Under the Hood” by Hollis Mason.
Hollis Mason is a relatively minor fictional character in the Watchmen comic from ~85. The book is barely mentioned in the comic.
Alpha Nerds only, need apply. 
Yes. In the original Pacific Rim trailer, Ellen McLain speaks in her full-on GLaDOS voice as Gipsy Danger’s AI. She is still the voice of the AI in the movie, but del Toro decided to tone down the digital modulation lest Portal fans think there was supposed to be a connection that really wasn’t there.
Incidentally, McLain is married to John Patrick Lowrie, the actor who is the voice of the sniper (it’s a good job, mate!) in Team Fortress 2.
Because it’s a terrible joke, where the punchline doesn’t actually follow from the setup in any meaningful way.
Not every joke has to rub the punchline in your face like it’s right out of The Marx Brothers. Arrested Development was practically built on subtle jokes like these.
Michael (to G.O.B.): Get rid of the Seaward.
Lucille: I’ll leave when I’m good and ready.
The Elder Scrolls III: Morrowind has Arlowe and the Banhammer. “Arlowe” was named after Richard “Lowtax” Kyanka (often “R-Lo” for short), creator of the Something Awful website.
In Skyrim, high atop the tallest mountain in the game, the player can find a Notched Pickaxe. “Notch” is the creator of Minecraft.
I’ve noticed a lot of examples in this thread aren’t really easter eggs, but instead are cameos, shout-outs, homages, etc. Which is fine, I suppose. However, this particular joke is none of these – it’s merely a dumb throwaway sight gag. Which means we should all probably stop talking about it.
In Dragon Age: Inquisition I stumbled across this one that made me laugh.
An ambient conversation by two people in the royal palace smoking room has two people debating the Tower of Hanoi puzzle. It’s a tired old logic puzzle that Bioware puts in nearly every RPG of theirs, and thankfully omitted it from this game.
The weird bit is that nobody in the early days seemed to give much thought to how much extra disk space these awesome easter eggs were taking up, and how fucking worthless they were once you’ve seen it once but know you still have to copy, what was it, 36 disks or something onto more computers, whether you like it or not. I’ll just go ahead and and say fuck Microsoft for one more reason. Maybe they should’ve spent their time making better operating systems instead of disks worth of bullshit 97% of users never saw or even had any idea of.
Computer BASIC easter eggs:
On a Commodore 128, typing “SYS32800,123,45,6” will give you a screen with the software and hardware developers, as well as the phrase “Link arms, don’t make them.”
Typing “WAIT6502,1” (6502 referring to the 6502 processor) in a Commodore PET with V2 basic on it will display “MICROSOFT!” on the top left corner of the screen. The story is that Bill Gates himself put that Easter egg in there (though I can’t remember whether that’s been verified or not.)
I’ve never been much for computer games, but I do like puzzles. Back in the mid '80s, a coworker told me that he had been playing a PC text adventure game (I don’t remember which one), and his character found a series of numbers on a wall. It was all ones and zeroes, in ten groupings of five digits. He thought that they might translate to ASCII or EBCDIC characters, and asked me for help.
It clearly wasn’t either of these. I worked on it through my lunch hour, and finally figured out that it was Morse code, with the ones representing dashes and the zeroes dots. Groupings of five meant that they were numeric digits, not letters. The message was a phone number. I don’t remember what happened when my friend called it.
hmmm wow very nice well can you share the pic…
Came across this Archer Easter egg which is even more insane.
You have to read through it to let it all soak in, but it’s a whole Kreiger thing including a real life Craigslist listing, a Reddit subgroup and a whole website findable by decoding obscure clues within the show.
Erm. There’s a whole friggin’ section of the book as an appendix in one of the issues of the comic and the book is referred to several times (most notably in Sally’s back story). Also, Hollis’ fate (no spoilers) plays an important part in Dan’s actions. So he’s not THAT obscure within Watchmen.
But definitely an Easter egg for Kingdom Come.
We have a winner.
Finding the ones on the Dr Horrible’s Sing-Along Blog DVD can be downright diabolical (or would be if we didn’t have the internet to tell us how to find them). Try this one on for size:
Ho-lee shit.
How in the hell did anyone figure out to do all of that??
In fact, a section of the book makes up the closing pages of the first issue. And the closing pages of the second issue. And the closing pages of the third issue.
That’s a pretty good one. I would’ve been tripped up by the spectrograph (never knew you could encode that way). The hex-to-ascii stuff I could swear I’ve seen before as an Easter Egg in some other show. (ETA: Actually, it might be the other Archer episode that was linked to above, with the Konami code.)
Quite right - I only remembered the first one (because hey, rubber boobs) but there are indeed two more excerpts.
In a “blink and you’ve missed it” moment, on a recent episode of The Originals, there was a Twisty the clown (from American Horror Story Freak Show) decoration on a street vendor’s cart.
Yeah, until someone pointed it out to me online to me years ago, I thought the joke was solely that Chuck didn’t rhyme with Feed & Seed, not that it was supposedly Chuck’s Fuck & Suck.