With the aid of the thunder god known as Raiden, Earth's
mightiest heroes have repelled all invasions from other-worldly
forces through a tournament known as Mortal Kombat.
Although there has been relative peace for many years, a new
threat to Earthrealm has emerged. And this time, the threat of
evil has two faces.
In an attempt to seize control of the realms, the sorcerers
Shang Tsung and Quan Chi have joined forces and are preparing to
revive the lost army of the mythological Dragon King.
Should they succeed, they will be unstoppable. Once again,
Earth's heroes must venture to Outworld and kombat the forces of
evil. They must act now. They must stop this Deadly Alliance.
--From the GBA Mortal Kombat: Deadly Alliance instruction manual.