In the old days, psychopathic killers had to settle for having active fantasy lives, saving souvenirs and reliving their crimes, looking at *advertiser censored* magazines or violent images, etc. They disconnect from reality into their own world, where they make the rules and do as they please with no consequences.
Their plan to float down the Nelson River to "hijack" a ship in Hudson Bay and escape to Africa or elsewhere sounds exactly like a plot from a video game.
While video games may not cause people to become psychopathic killers, it does a much more efficient job of organizing and escalating those kinds of pathology and aberrant behavior. K&B were likely influenced and inspired by their gaming addiction to take it to the next level. Living so long in that fantasy world kept them from realizing the harsh consequences, even to the point of being less concerned about their own imminent deaths than about making sure everyone knew they "won" at their chosen game.
