Hellgate: First Impressions with Ripper X
From the Hellgate site:
London, 2038. Finally, the war risking the fate of human race begins.
Hellgate of chaos has summoned the demons to earth. With the ruthless attacks from the demons,the human race fell down. Everything was changed by that day's battle. As the dark era and world full of horror and fear continue, the mankind begins to prepare for their future as they face the downfall. Mankind's desire for hope was even more stimulated in the dark abyss while the heroes gathered in London found ways to counterattack.