http://db.gamefaqs.com/console/gamecube/file/mortal_kombat_history.txt
This site has all the bios and endings. It's pretty accurate.


This is Noob's Trilogy Bio:
Noob Saibot emerges from the darkest region of reality - a region known as the Netherealm. He belongs to a group called the Brothers of the Shadow, and worships an evil and mysterious fallen Elder God. His mission is to spy on the events taking place in the battle between the realms and report back to his enigmatic leaders.

and ending:
At first a passive observer, Noob Saibot would soon receive orders to side with the evil emperor Shao Kahn. Saibot's leaders in the Netherealm want him to join Kahn's battle to gain his trust and to gain entrance into the Earth Realm. When Kahn drops his guard, Noob Saibot is ordered to attack. With both the Earth realm and the Outworld's emperor defeated, the fallen elder god known as Shinnok can take both realms and gain the power he needs to strike back at the elder gods who banished him into the Netherealm.


And this is Noob's MK:TE bio:
Still under orders from Shao Kahn, Noob Saibot was commanded by the emperor to eliminate any groups or individuals whose power might pose a threat to Shao Kahn's rule in Outworld. Many would-be leaders have been slain by the dark ninja, but his current target will be his most challenging.

and ending:
The allied forces of princess Kitana and prince Goro were locked in Mortal Kombat with Shao Kahn's army when Noob Saibot made his move on an unsuspecting and battle-weary prince Goro. The two fought savagely, but it was Noob Saibot who gained the upper hand and mortally wounded Goro.