Octopus - Gamepad, Keymapper 2.2.1 (arm-v7a) APK Download by Octopus Gaming Studio - APKMirror
Connect Your Gamepad to Any Game on Your Android Device [How-To] - YouTube
RT RockTek GP1000 3 Modes Wireless& Wired Gamepad Controller with Bluetooth/2.4GHz/Wired Support PC Steam Games/Phone Bracket/Vibration/PC Xinput/Android Xbox One Systems - Newegg.com