Massive Black is a studio based in San Francisco, California. Founded in 2003 it became a leading company providing stunning visuals and amazing concepts.
Clients include companies like: Activision, Bungie, Hasbro, Konami and Ubisoft (there is a full list on studio website and sure, it's massive!).
Massive Black fields are: illustration, concept art, animation, storyboards and many more, like a (kick-starter funded Zombie Playground.
It is a well known studio in the industry with many professional artists like Jason Chan.