E E E Egg: In the area just after where the soccer ball/scarab gun are, you'll come to a spot where you have to fight a couple Wraiths and Ghosts. On the left side of this area (to the left when facing the building that you rejoin the Marines in) there is a pathway where the Wraiths do not go. The Ghosts will follow you over here though. Kill off the enemies in the area, then head over here to the far left corner and you'll find a flashing sign. View the sign for a few seconds while in Anniversary mode and the achievement will unlock.