David Mullich was born in 1958, at St. Josephs hospital in Burbank, California, literally across the street from the Walt Disney Studios, one of his future employers. He received his Bachelor of Science degree in Computer Science at the California State University, Northridge, in 1984 (he completed the coursework already in 1980, but postponed to get all the needed signatures).

Mullich has been designing, developing and producing interactive entertainment since 1978, when he started Greenleaf Productions. One of his first hits was an adventure based upon “The Prisoner” television series, that he made while he was Vice President of Software Development of Edu-Ware Services (1980-1985). He went on to co-found Electric Transit, a company that specialized in 3-D simulations and that was Electronic Arts’ first affiliated label publisher (1985-1987). Later on he joined The Walt Disney Company as its first software producer, and created numerous titles based upon Disney films, television programs and characters (1987-1991).

He was Producer at the Interactive Support Group for two years, after which he worked as Director of Development at Cyberdreams (1993-1997). Mullich joined Cyberdreams shortly after Harlan Ellison and David Sears drafted their treatment of I have No Mouth, and I must Scream, and after several months he had turned a 130 page draft document into a 800 page game design document containing more than 2000 lines of additional dialogue. Besides No Mouth’s author Harlan Ellison, he worked with H.R. Giger (Dark Seed II) and Jeff Blyth (Noir: A Shadowy Thriller).

He went on to work as Senior Director at The 3DO Company/New World Computing (1997-2002), where he lead the team that created the best-selling “Heroes of Might & Magic” fantasy strategy game franchise. After he and most of the team were laid off by NWC, he was hired by Activision (2002-2005) to produce real-time strategy games based upon the Star Trek license. After the work on the Star Trek games was halted, he was assigned to produce Vampire: The Masquerade – Bloodlines. He took over the troubled project in mid-development and brought the project back on-focus and on-schedule (it won ActionTrip’s and RPGVault’s “Best RPG of the Year” award). After Activision he worked as Director of Development at Abandon Interactive Entertainment.

Since January 2008 he runs Blacksheep Interactive, a consulting service on the design and production of casual games, MMO's, and websites. The name is an homage to his game The Prisoner, in which he used a sheep motif, and also to one of his favorite employers, Cyberdreams, which used an “electric sheep” logo.