How to change the name of the game in the steam activity status?

Question

Steam

I know that you can add a third-party program, but then if you run it (for example, DotA), then we will show that you play DotA and not what you added, but you want to launch the game and something cool was written if this is possible :)

Answer 1

In a legitimate way, no way.
Only through hacking Steam itself.