The Prisoner is easily soloable. There is, however, one tricky bit. After you turn off the generator, how do you get passed all those guards? When I ran through it with my guild, we just killed them all, but that’s not really feasible when running solo. Well, here’s how you do it. I feel like this is how it was intended, given where the story goes after you make it down the tunnel. At least, that’s what I tell myself.
I included the cut scene at the end because it is scenes like that that make me love The Secret World. It’s just so well done.