Unless they have documented their attempts to seek counseling or something else, my feeling is that they have no leg to stand on in the legal sense. If they could not handle it, then they should have quit. Unless they can prove that they were forced to continue doing that job.
The employees allegation is that the job was forced on them for a 1.5 year time frame and they were instructed to play video games to divert their attention from the horrors of the interweb. Then when the job performance review came in they were playing too many video games.