How does Steam Achievement Manager work?

[asdawdfawfasfadawdawd]

Hello, I decided to be interested in how this program can emulate the launch of a game and not launch it completely on Steam (Boost hours in the game)
Does this program change the files of the game and the steam itself?
If it's not too much trouble, could you give me an example from the source code of Steam Achievment Manger of how it launches the game?
I couldn't read and understand the entire code manually. Well, or provide an example of the code yourself, not necessarily from Steam Achievment Manager

Sorry for the stupid questions

[Paslik19]

My dear friend, you're a little confused😁. This program, as its name suggests, only allows you to change your Steam game achievements, namely to unlock and block certain achievements. If you need a program that will emulate game/program launches to beat out cards on Steam, then I can recommend IdleMasterExtended