The Expanse Roleplaying Game - Rules of Play says:
The Expanse Roleplaying Game brings James S.A. Corey’s award-winning series of science fiction novels to the tabletop. Using the Adventure Game Engine (AGE) rules found in such Green Ronin RPGs as Fantasy AGE, Blue Rose, and Modern AGE, The Expanse takes players to a far-future solar system where humanity is divided: Martians, Belters, and the people of old Earth struggle for political power and resources, but even older, alien, forces are stirring in the universe, and human history is about to take an unexpected new turn. The Expanse applies the fast-playing and action-based AGE rules to spaceships, solar colonies, and adventure and intrigue in the far-future, where the actions of the characters may change the course of history!