The Cortex Plus System is a toolkit RPG system that evolved from Margaret Weis Productions' Cortex System. It has been used for several games, including Firefly, Leverage, Marvel Heroic Roleplaying, and Smallville. (For questions about the original Cortex System, use the [cortex] tag.)

The Cortex Plus System is a toolkit RPG system that evolved from Margaret Weis Productions' Cortex System. This refinement of the Cortex System powers several games, including Firefly, Leverage, Marvel Heroic Roleplaying, and Smallville.

(For questions about the original Cortex System, use the tag.)