Harris levels

The Harris levels are levels created for Doom by Eric Harris, one of the two teen gunmen in the Columbine High School Massacre. An urban legend spread that these levels were designed to look like the halls of the high school, populated with representations of Harris's classmates and teachers, and that Harris "practiced" for Columbine by playing these levels over and over. However, though Harris did design Doom levels, they were not simulations of Columbine.