< ! -- Deleted image removed : In April 1999 , the fears of the media and violence-watch groups were legitimated in their eyes as investigations into the lives of Eric Harris and Dylan Klebold , the shooters in the Columbine High School massacre , revealed that they had been fans of the video game , '' Doom '' , and had even created levels for it today dubbed " the Harris levels " . A great deal of discussion of violence in video games followed this event with strong arguments made on both sides , and research into the phenomenon which had begun during the 1980s received renewed support and interest
Columbine High School massacre
Columbine High School massacre
Nonviolent video game