One zombie game tips its hat to another with this Easter egg. In the first Resident Evil after one character saves Jill Valentine, the protagonist, from a trap, he says, “You were almost a Jill sandwich!” In Dead Rising, one of the eateries in the mall you’re trapped in is called Jill’s Sandwiches. Referential!
If you played Dead Space and were all, “Yo, what’s the deal with Nicole,” you can find the answer with the first letter of each mission title. Put together, they spell, “NICOLE IS DEAD.” Mystery solved!
Dead Space 2
Beat this game in “hardcore” mode and it will reward you with a foam finger, but not just any, stadium-variety foam finger. This foam finger is, as the game describes it, a hand cannon, and it will blast your enemies apart all while going “pew pew pew.”
Jump through a portal and you get to fight some seriously tough ax-wielding cows. This Easter egg is an inside joke among Diablo diehards: There was a rumor about the first Diablo that if one of the random cows that appeared throughout the game was clicked on enough times, a portal to a secret level would open. This rumor came true with the sequel, with a hidden level full of heavily armed bovines.
Along with cows, you can also fight brightly colored ponies. In Diablo 3, after speaking with the ghost of the Cow King, you enter the realm of Whimsyshire, where you must combat your darkest, most demonic foe yet: giant, My Little Pony-style unicorns. It’ll make you shudder in terror.
Shoot the final boss–a giant demon head–with a rocket launcher, then enter the “noclip” cheat code. Walk through the hole you’ve made in the boss’s head, and into a room. In the room you’ll find another head, that of John Romero, the creator of the Doom series. He’ll say, backwards, “To win the game, you must kill me, John Romero.” Shoot him a bunch of times and you indeed win the game.
In the penultimate level, go to the third room and press the action button at one of the walls. It will open and inside will be a familiar sight to Simpsons fans: Homer’s desk at Sector 7G of Mr. Burns’s nuclear power plant, including donuts.
Find and open a hidden door, and you’ll be greeted with a really rude message in graffiti. Sigh. Some Easter eggs are rotten.
In the wasteland, you may come across a refrigerator, a strange thing to come across in the desert, to be sure. Open it and you’ll find a skeleton wearing a fedora. It’s Indiana Jones himself! Apparently that “nuke the fridge” trick he pulled in Kingdom of the Crystal Skull didn’t work out to well for him.
Play the Rolling Thunder mission on insane difficulty. At the beginning, there are three cowboys hats down on the ground below your huge vehicle. Shoot all three. You’ll hear a “Yee-haw!” and you and your team will be wearing cowboy hats. Down the road, you’ll encounter a corpser bursting from the ground. It too will be wearing a cowboy hat and bellowing, “Yee-haw!”