The image above is from the game Deus Ex: Human Revolution.
Recognize it? Remember the Dopefish? The big, dumb fish that appeared in the water level of Keen 4? If not, you missed out on the golden age of PC gaming. (Go buy a 386 and we’ll talk.)
Images of the Dopefish have been snuck into video games for nearly two decades. It’s like the “Andre the Giant Has a Posse” poster of gaming.
Incidentally, Deus Ex: Human Revolution contains a number of other subtle Easter Eggs.