Changing the title:
The "Playing" title is locked to the Application name. To change it, rename the app in the developer portal,
then disconnect and reconnect. Discord may take a minute to update.
Multiple titles:
Create several Applications with different names and swap between their IDs to quickly change what you're "playing."
Ghost entries:
If old game names linger, go to Discord → Settings → Activity Settings → Registered Games and remove them.
No bot token needed.
This uses Discord's local IPC socket, not the bot gateway. No permissions, no OAuth, no server required.