Polar Ventura was a city in Iceland. The city hosted Murder Spree 20 sometime before 200,100. The event was the subject of a history-related question on the Game Station's The Weakest Link in that year. (DW: "Bad Wolf")
Due to what is implied by the name of the event, it is likely that Murder Spree 20 was an edition of one of the game shows produced by the Bad Wolf Corporation sometime in the one hundred years following the collapse of Satellite 5.