A wagering game system and its operations are described herein. In some embodiments, the operations can include determining that a secondary wagering game application is compatible with a primary wagering game application, wherein compatibility is based in-part on an ability of the primary wagering game application to provide wagering game information to the secondary wagering game application via an application programming interface. The operations can also include enabling the secondary wagering game to present a secondary wagering game in connection with a primary wagering game controlled by the primary wagering game application.