Rainbow Six Extraction has been developed for playing with friends, but you can be a lone wolf if you want.
Source: N4G PC Rainbow Six Extraction Can Be Played As a Single-player Game but It's Not Advised
Rainbow Six Extraction has been developed for playing with friends, but you can be a lone wolf if you want.
Source: N4G PC Rainbow Six Extraction Can Be Played As a Single-player Game but It's Not Advised