The game again sparked controversy throughout a period of school shootings in the United States when it was found that Eric Harris and Dylan Klebold , who committed the Columbine High School massacre on April 20 , 1999 , were avid players of the game . While planning for the massacre , Harris said in his journal that the killing would be " like playing '' Doom '' " , and " it 'll be like the LA riots , the Oklahoma bombing , World War II , Vietnam , '' Duke Nukem '' and '' Doom '' all mixed together " , and that his shotgun was " straight out of the game " . A rumor spread afterwards that Harris had designed a '' Doom '' level that looked like the high school , populated with representations of Harris 's classmates and teachers , and that Harris practiced for his role in the shootings by playing the level over and over . Although Harris did design '' Doom '' levels , which later became known as the ' Harris levels ' , none have been found to be based on Columbine High School
Columbine High School massacre
Columbine High School massacre
Doom (1993 video game)