How do cheats work in online games (Multiplayer)?

Question

reverse engineering

What is the principle of operation of modern cheats? I'm primarily interested in cheats for the GTA5 game, or rather, even for multiplayers (FiveM, Rage.MP, AltV). How do they function?

It's not entirely clear to me how these cheats work. Do they somehow call on the client side the functionality that is in the game (native C++ code), or call the functionality provided by a specific multiplayer for the client side (client-side), then how do they synchronize it all?

Answer 1

The principle is the same as not in modern ones. This is either interfering with the memory of the game process and modifying the values, or intercepting / modifying the network traffic of the game.
Suppose we know the offset in the process memory where lives / cartridges are saved, no one bothers us to change it, and if the pogromists were completely stupid there, then this value is always located at one offset and is not encrypted in any way, and there is no check from the server side, t .e. he trusts the client completely.
Again, no one bothers us to disassemble the communication protocol between the client and the server and simply send fake values ​​to the server.
Well, completely head-ass developed also manage to give more information to the client than is necessary for the game environment, such as the coordinates of all opponents / loot. The clearest example of PUBG, where the radar for opponents / loot even worked on consoles, just intercepting game traffic.