I can provide you with a quality solution for this project as I have good experience and grip on the tools needed for the job, such as Unity Engine. I have developed many applications that involve multiplayer environments (using Photon), Facebook Integration, Google Play Games integration, Chartboost integration, AdMob integration, etc. I have a few games on Play Store that I can share with you, upon request. You can also refer to the reviews section on my profile to see how many other satisfied customers have rated my work.
We can further discuss the budget and requirements in detail to find a solution that suits you.
Regards,
RAS.