Riot Desktop
  1. Download and install Riot Desktop.
  2. Press the "Sign In" button.
  3. Next to "Sign in to your Matrix account on matrix.org", click "change".
  4. Set https://halogen.city as your Homeserver URL and Identity Server URL.
  5. Click the "Next" button.
  6. Enter your username and password, then click the "Sign In" button.