Hi, I'm a game developer with 4 years of experience in game industry, I can design and build your fps game, it isn't difficult to do. I want to solve all of your problems and build this app for any platform, hope you too.
I can use Unity3D, Unreal Engine 4, Android Studio, and many others.
I have a lot of experience with fps, especially for this type with this gamemode, I can create and build the fps, this is a perfect job for me.
I am available for any clarification on the expiry date and on the budget.
For extra information go to my account to read my skills, I wait for more information ;)