As the market for multi-game subscription gaming services grows, Microsoft could use its control over ABK content to foreclose rivals, including recent and future entrants into gaming as well as more established players such as Sony. Absent the Merger, ABK games would in principle be available to any multi-game subscription service. The CMA recognises that ABK’s newest games are not currently available on any subscription service on the day of release but considers that this may change as subscription services continue to grow. After the Merger, Microsoft would gain control of this important input and could use it to harm the competitiveness of its rivals. As the multi-game subscription market is still in its infancy, the effect of the Merger could be to tip or significantly increase concentration in the market in Microsoft’s favour before future rivals have a chance to develop. The CMA therefore believes that the Merger gives rise to significant competition concerns in multi-game subscription services (including cloud gaming services, to the extent these are distributed through multi-game subscription services).