Egg Quarters
From Sonic Retro
File:Beetle1.png
One of the indestructible Beetle robots which constantly patrol the level
Egg Quarters is the fifth stage in the Dark story of Sonic Adventure 2, and represents Rouge's attempt to break into Eggman's secret base (coming, as it does, at a point in the story where the other Dark side characters don't know who Rouge is).
Egg Quarters is only half the size of the corresponding Hero stage, Death Chamber, but compensates with the addition of two large, invulnerable beetle robots that patrol around the stage. If one gets close enough to the player, it will let off a series of five warning beeps, after which time Rouge will take damage unless she either gets a significant distance away from the robot, or hides in a shadowy area, before time runs out.