[1] He co-designed Maniac Mansion, alongside Ron Gilbert,[2] and created the comic book Bad Dreams.
Horizon Zero Graphiques also published the comic magazine Mindworks by Brent Anderson, which included art by Gary.
In 1992, he was the designer, artist, and animator on Defenders of Dynatron City and co-wrote the comic based on the game, with Steve Purcell.
[6] Before leaving LucasArts in 1993, he contributed dialog and story to the sequel to Maniac Mansion, Day of the Tentacle.
In 1995, he co-founded the video game company, Orbital Studios, where he served as executive producer.