Noob Saibot first appeared in Mortal Kombat II as a hidden character players could challenge. He has since become a playable character in many Mortal Kombat games. And in case you haven't realized it, the name Noob Saibot is actually the last names of Mortal Kombat co-creators Ed Boon and John Tobias backwards.

Noob Saibot was actually the original Sub-Zero in the first Mortal Kombat game. He was killed by Scorpion in retaliation for killing him and his family. He is often referred to as the Elder Sub-Zero.

Upon his death, due to the evil tainting his soul from years of living as an assassin, Noob instantly descended into the Netherralm. While there, he eventually became a member of the Brotherhood of the Shadow, serving Shinnok. His first task bestowed upon him was to observe and report on the events taking place in Earthrealm and Outworld, during the events of Mortal Kombat II.

During the events of Mortal Kombat 3, Noob was ordered to align himself with Shao Kahn during his invasion of Earthrealm. However, once the Earthrealm warriors began to gain the upper hand, Noob was then ordered to aid them in defeating Shao Kahn. With Shao Kahn defeated, Edenia would be freed from Outworld and open to attack by Shinnok and his Army of Darkness. However, Shinnok and his forces were eventually defeated, and Noob Saibot, reluctant to return to the Netherrealm, returned to serve Shao Kahn in Outworld.

During the events leading up to Mortal Kombat: Deadly Alliance, Noob appeared in a battle between the Armies of Edenia, which now included the Shokan, and the legions of Outworld, led by Kano. During battle, Noob wounds Goro. Believing their prince to be dead, the Shokan are left in disarray, and the war ends in a stalemate.

Believing Shao Kahn slain at the hands of the Deadly Alliance, and with Shinnok once again banished to the Netherrealm, Noob Saibot decides to no longer serve any master, and persue only his own interests. While searching Shao Kahn's fortress, he discovers the de-activated body of Smoke. Reprogramming the cyborg to remain loyal only to him, Noob plans to use Smoke's nanotechnology to create an army of cyber-demons.

After the events of Mortal Kombat: Deception, the pair travel to the Netherrealm, but are followed by the current Sub-Zero, Noob's younger brother. Once they discover his presence, they attack, but Sareena interferes, and together they are able to defeat Noob and Smoke. After the battle, they flee into the pits of the Netherrealm.

During the events of Mortal Kombat: Armageddon, Noob and Smoke attack the Lin Kuei temple in Arctika. Taven, who was in the temple at the time, defeats the two, along with a small group of cyber-demons. With Noob weakened, Sub-Zero sees this as his chance to free his older brother from what he has become. It is unknown if he succeeded.