Just don't use it, it's not an app, it's part of the system and cannot be removed. If you are actually referring to other gaming related things, if you have a carrier locked phone those are installed by your carrier.
It can be disabled or removed. You'll need developer mode on, usb debugging enabled, ADBAppControl from adbappcontrol.com. Via a pc hooked to your phone, you just need to go through & find the app you want to disable or remove. I disabled game booster instead of removing just in case it's tied to something. Use at your own risk.
