Mary DeMarle is a video game writer. She is most well known for her work with the Myst and Deus Ex series of games.
DeMarle first started her writing career working in the entertainment industry. DeMarle's first credits as a video game writer was for the 2001 game '. She was the lead writer of ' and its 2016 sequel '. For the former she won the 2012 Canadian Videogame Award for Best Writing.
She was the Narrative lead for the 2021 game Marvel's Guardians of the Galaxy, which she won The Game Award for Best Narrative and the D.I.C.E. Award for Outstanding Achievement in Story.
DeMarle is known for writing for games with multiple branching narratives.
In 2022, DeMarle joined BioWare as a senior narrative director.
DeMarle has a Bachelor of Science from Syracuse University in Television, Radio, and Film Production.