Portal 2 Easter egg tutorial 

This game has so many easter eggs it's not funny.

This is awesome.....I'm going to buy the game right after finals.

first when i saw this i thinked that there was a secret in that room but it was just them singing

everyone that has watched portal videoes has seen this easter egg

Lemme guess... the Prima Donna Turret is conducting?

Everyone seems to just not look around and see the fat turret frm the portal 2 ending

Lol nice! I didnt see that.