What is Mortal Kombat: Nightblood (MK:NB)?

Mortal Kombat: Nightblood is a story driven play-by-post online role playing game (RPG) where heroic characters can explore an offshoot world set in the Mortal Kombat universe. Where players can interact with each other and a host of pre-generated NPC’s (non-player characters). They can explore the worlds presented, fight for the survival of the Earth Realm, and develop complicated inter-personal relationships.