Borderlands: Rise of the Omega

Zer0, an assassin with a mysterious past, tries to escape his demons. The Vault was believed to be his escape. But even on Pandora, you're past comes back to haunt you. Now Zer0 must make the ultimate choice, become the monster he was born to be and destroy the life he has now. Or conquer his demons, and become something much more. He is Zer0, he is the Omega. Zer0/Harem.