It was a cold and dark night today, the dark clouds covering the moon and the only light source being the city you are in. It's been so many years since the last war, technology has gotten so advanced, where humans started to mind control animals and even titans and giving them weapons and armor. Celestia, the floating city, shining bright in the sky through the clouds.

The holding facility between the large mountains are responsible for the titans having weapons and mind controlled to save humanity, is currently holding a new titan, a veru powerful and large one. They decided to keep this one a secret from the public, they named this titan, E-17B, or Experiment 17B. According to some rumors, this titan was made in animals and kaiju flesh, E-17B is a hybrid kaiju. Another rumor is that the company in the facility failed to give it weapons and armor, and their only option is to mind control it. Folks that are against the company, call E-17B, Gilgamesh.

You are exiting the city, you are at the entrance of the gates, ready to leave. You look back behind you to say one last goodbye to the city. As soon as you were about to open the gates, the city's light went out, every building went dark, strange... Then you hear a deep gruesome roar inside of the holding facility in the mountains, you hear chains breaking that are very loud it can be heard in the city. The roof of the containment facility broke with a arm coming out with a fist. Then the entire roof came off alongside something jumping out...

It lands and slowly getting itself to full height, its E-17B! It escaped, it is much and much bigger than you thought. It slowly crouch down before getting itself to full height at fast speeds and looking at the sky and roars. Its mouth started to spew out red substances into the clouds, they turn dark red and started to rain hot steaming blood. Dark fog cover the entire nation.

Experiment 17B, The Gilgamesh, has escaped... Celestia's and Teyvat's worst nightmare, is here...