The method discussed in OP requires UDP telemetry to be implemented by the game. Not every game will have this option. I recall a researcher friend who tried

The method discussed in OP requires UDP telemetry to be implemented by the game. Not every game will have this option. I recall a researcher friend who tried RL on an arbitrary game of his choice by exploiting the system memory used by the game and using the memory state as a game state. Of course, the memory state is not human-readable (unless you have the source code and the intimate knowledge of the game; even so, it would be a difficult thing to do by a human) but a clever RL algorithm would treat the state just the same as from a human-readable state space. His project was a wild success and beat an experienced human player. I recall he had a youtube video somewhere. I miss that guy.