Three earlier text adventures, Adventure in the 5th Dimension (1983), Crash Dive! (1984), and Tachyon (1985), an adaptation of Atari's Quantum arcade game., were published in the pages of ANALOG Computing, a magazine for Atari home computer enthusiasts at which Moriarty was employed as Technical Editor.
His first graphic adventure game was Loom, published in 1990 by Lucasfilm Games. After that, he worked on two sequels, Forge (1991) and The Fold (1992). The next adventure game he made was The Dig (1994), a game based on an idea from Steven Spielberg.
On occasion, Moriarty delivers public lectures, one of which has been turned into an amateur dramatic production.
^Cooke, Amy (24 May 2011). "Open Drama Night". Nouse: University of York's Student Website. Archived from the original on 3 June 2011. Retrieved 9 June 2011. A Brechtian style piece, based on a lecture Todd received by Brian Moriarty, the play explores the history or rather the historiography surrounding the issue of the authorship of Shakespeare’s plays.
^Moriarty, Brian (November 1986). "Designer Profiles / Brian Moriarty". Computer Gaming World. p. 16.|accessdate= requires |url= (help)
^Moriarty, Brian (Holiday 1982). "The Black Magic". ANALOG Computing. p. 49. Retrieved 18 August 2014.Check date values in: |date= (help)