A Source Engine Discord Rich Presence implementation.
It parses console dumps from the condump command to figure out the current game state.
No, since it never touches the games memory. It uses commands that are built-into the Source Engine.
Change the settings to the game you want and the path to said game. Settings should already contain an example. You can then run it with Node.JS
Next, make sure this is in your games autoexec file
alias update_rpc "clear; status; condump; clear"
You will have to run the previous command when the current Rich Presence is outdated (i.e. joined another server, user left, etc.) We recommend adding this to a key-bind for easy access.
This is still very early access, and currently only has guaranteed support for Left 4 Dead 2, but I can't see why this wouldn't work on other Source Engine games.