Fortress of the Abyss: Ultramarines

In 2053, alienated creatures surged out along the cracks in the earth's crust and swallowed up the entire abyss base in an instant. Lin Yuan - the only survivor of the accident codenamed "Abyss Echo", escaped from the deep sea back to land with bone-eroding scars and indelible nightmares. Now, as the third generation of the Dragon Kingdom's Ultramarines, he has returned to the abyss with three Ultramarines, with only one goal: to shut down the reactor in the third area and cut off the source of the spread of alien power. However, when they once again stepped into this underwater ruin transformed by alienated objects, what lay ahead was only the dead silence of the deep sea and endless aberrations.