You know, prison doesn't sound like much of a deterrent if you have access to stuff like video games...
That's because you don't realize just how much of a punishment losing your freedom is. The guy will live the rest of his life in that one room with restricted access to the rest of the prison, for his own protection. He can't mingle with the rest of the prison population, and he's got nobody to visit him after his mother died recently. His forms of entertainment are outdated and heavily censored. He can only read books, play games, or watch movies that are considered "safe". Violent content is a no-go, so you can exclude 95% of games right there.
His life has become hell. Make no mistake about it. He just lists all the wrong reasons why.
Anyway, just ignore the terrorist. He's made it very clear that he's got delusions about how things work (he's called his prison sentence "torture" on more than one occasion). He's locked away, so there's no reason for us to even think about him. The only ones that should be concerned about his existence are the prison guards and lawyers.