Microsoft Sam Easter egg

The Microsoft Sam Easter Egg is an Easter egg which can be found on the Halo 3 level, Covenant. It must be done on Normal or higher difficulty and the player must start from the beginning of the level.

Method
gTu4IfPUJ4k After you have defeated the Scarabs, obtain a Hornet or a Banshee and fly to the right ledge of the Citadel. Walk straight till the end of the edge, reaching a wall. It takes about 2 - 3 minutes for you to hear Microsoft Sam commenting on the game and its developers.

Transcript
Sam: "OMG (Oh My God) this game needs more guitar wank. Am I right?"

Sam: "Happy Easter Marty."

Sam: "I am a monument to all Marty's sins lololol."

Sam: "J and C Paul, you are so totally fired."

Trivia

 * On the left ledge of the Citadel, there is a song called Siege of Madrigal.
 * Microsoft Sam is a built in computer voice narrator in Windows XP text-to-speech function.
 * Microsoft Sam's third line is a reference to a line said by Gravemind in a cutscene from Halo 2.
 * Microsoft Sam is the voice of Master Chief in the popular series Arby 'n' the Chief and Gary/Gamma in Red vs Blue.