Problems with keymapping

Hi guys,
I usually play a lot of games and my usage of the VIM3 is no exception. But many games are not responding to keyboard input. Is there any good keymapping app in the playstore ?
Please link them if you know any.

Yes there are some Like
Free Versions
Octopus - Gamepad, Mouse, Keyboard Keymapper
ShootingPlus V3

Paid Version
Panda Gamepad Pro (BETA)
Panda Keymapper 64bit - Gamepad,mouse,keyboard

But some games have banned usage of such app, Like PUBG banned Octopus usage as well as users. I have tried Panda Gamepad when it was free, Octopus and Shooting Plus, they all worked at the time I tested. Last week when I tried octopus with PUBG then it didnt allow me to launch as it was banned.

Do write in detail once you give these a try.