Straight Up Films is developing an adaptation of "Thief," the stealth video game franchise published by Square Enix.

Adam Mason and Simon Boyes ("Misconduct," "Not Safe For Work") are set to write the project, which will be produced by Roy Lee and Adrian Askarieh.

Debuting in 1998 with "Thief: The Dark Project," the game series is set in a fantasy/steampunk world that combines elements of the late Middle Ages and Victorian era, where players assume the role of a master thief named Garrett. The fourth installment of the franchise, titled simply "Thief," was released in 2014.

Straight Up co-produced the Johnny Depp sci-fi film "Transcendence" for Warner Bros. Lee, whose credits include "The Ring," "The LEGO Movie" and the upcoming adaptation of "Death Note," will produce "Thief" under his Vertigo Entertainment banner.