Mortal Kombat III

You have been chosen to represent Earth in Mortal Kombat. Be warned. Although your souls are protected against Shao Kahn's evil, your lives are not. I can no longer interfere as your Earth is now ruled by the Outworld Gods.
These are the words of Raiden.

For centuries, Earth has used Mortal Kombat to defend itself against the Outworld's Emperor Shao Kahn. But Kahn becomes frustrated by failed attempts at taking Earth through tournament battle. He enacts a plan that began 10,000 years ago.

During this time Kahn had a Queen. Her name was Sindel and her young death was unexpected. Kahn's Shadow priests, lead by Shang Tsung, make it so Sindel's spirit would someday be reborn: Not on the Outworld but on the Earth Realm itself.

This unholy act allows Shao Kahn to step through the dimensional gates and reclaim his Queen, enabling him to finally seize the Earth Realm.

Upon breaching the portal into Earth, Shao Kahn slowly transforms the planet into a part of the Outworld itself.

Kahn strips the Earth of all human life: Claiming every soul as his own.