Final Fantasy XIII

FINAL FANTASY XIII is an action RPG with fast-paced combat, set in a science fictional world of the future. It's ruled by the Sanctum, a theocratic government, and a mechanical creature fal'Cie that has the power to make people its servants. You play as Lightning, a former soldier, who needs to save her sister Serah, who was marked by fal'Cie. She joins the resistance; however, they get marked by the creature too and have to fulfill its task to avoid death.  The key feature of the game is its complicated combat and development system.