Abstract: A method of managing a game platform. Using an authoring tool, a data set for a game narrative is generated. The data set includes transcripts that define tasks of non-player agents, such as Non-Player Character (NPC) agents, in a game session in which a player is operating under the control of a game engine. The data set is transformed into re-composable combinations of tasks structured as a multi-modal hierarchical network of tasks, wherein an individual path in the hierarchical network of tasks represents a plan that is a particular implementation of a task that having multiple ways of being implemented. During the game session, and using a director operating in association with the game engine, behaviors of one or more non-player agents are then orchestrated by receiving a set of observations occurring in the game and, in response, implementing a set of plans in the hierarchical network of tasks.