Last month, Christian Donlan found out what it's like to play Rainbow Six Siege alone. This was based on his experiences with Siege's terrohunt mode which can, if you prefer, be played solo.
If Donlan's fear of messing things up for a team of actual humans resonated with you, then rejoice! Rainbow Six Siege actually has a dedicated solo mode and, what's more, it's pretty great. I got hands on with these PvE scenarios recently and am poised to tell you all about them in the video below. Give it a watch and be grateful I probably won't be forming part of your squad any time soon.