All ORB files have an “Embedded Launcher”
The “Embedded Launcher” is included with every ORB and it works without any special software installed on the target system.
In practice this allows the user to execute any .orb file directly, without having to install ORB Launcher.
Technical details
The Embedded Launcher is an ELF executable, embedded in the ISO header.
When the user tries to execute an .orb file directly, the system will recognize the executable and run it. The executable will then mount the ISO and run the autorun inside, which launches the App inside the ISO.
Further reading: