Integrating games systems with a spectating system

A method, comprising:

• performing, by a spectating system implemented on one or more computing devices:
• streaming one or more broadcasts received from one or more broadcaster devices to a plurality of spectator devices, wherein each broadcast shows game play of a respective broadcaster participating as a player in a game executing on a game system;
• generating content for the broadcasts at least in part according to game metadata for the game received according to an application programming interface (API) of the spectating system;
• and
• providing indications of spectator interactions with the broadcast content to the game system according to the API.

A non-transitory computer-readable storage medium storing program instructions that when executed on one or more computers cause the one or more computers to implement a broadcast content module for a spectating system configured to:

• obtain one or more broadcasts from one or more broadcaster devices, wherein each broadcast shows game play of a respective broadcaster participating as a player in a game executing on a game system;
• obtain game metadata for the game from the game system according to an application programming interface (API) of the spectating system, wherein the game metadata includes one or more of game states for the game, game event data for the game, player inputs to the game, or data describing or representing game content;
• generate broadcast content for the one or more broadcasts at least in part according to the game metadata received from the game system;
• stream the one or more broadcasts and the broadcast content to a plurality of spectator devices;
• obtain spectator interactions with the broadcast content from the plurality of spectator devices;
• and
• provide indications of at least some of the spectator interactions to the game system according to the spectating system API.