How to read memory from a running application?

Question

Arduino

Not entirely competent in the variations of how the application works with memory, so the question may sound a little ridiculous.
The task is to read the information processed by the application (for example, the current engine speed in one of the toys) and transfer this information to the Arduino (but this is a separate story).
The catch lies in the choice of PL and the ability to read application data.
Tell me which way to dig.
Thanks in advance.

Answer 1

I would start by checking if it is possible to write mods for the toy (if it is Source, UE3, UE4, Cry Engine, then there is a high probability that there is such a possibility) and try to implement the required functionality through the game engine API.

Answer 2

Here a friend solved a similar problem by pulling data from the visual interface of the game:
How I screwed the speedometer to the tanks