12 Insane Links Between Popular Video Games You Totally Missed

9. Rage - Quake

This leans far more into Easter Egg territory than just a passing reference, but it's just too cool and rewarding that it had to go in. Rage isn't a shooter that a great many people sought out - even though there's some pretty cool A-list talent tucked away inside - and less noticeable was the tracking down of a series of four switches across four different floors in a chop-shop-styled level that when pushed, opened up a doorway to another world. That other world was none-other than developer id Software's claim to fame, Quake, although the area they recreated isn't anything combat-related, instead you'll be running around a 3D version of the original level-select screen, complete with a toy Shambler in the middle to take back through the portal.