An ISO file, also known as an ISO image, is an archive file that contains the contents of an optical disc, such as a CD or DVD. In the case of Return to Castle Wolfenstein, the ISO file contains the game's installation files.
Return to Castle Wolfenstein is a first-person shooter video game developed by id Software and published by Activision. It was released in 2001 as a reboot of the original Castle Wolfenstein game. RETURN TO CASTLE WOLFENSTEIN ISO