Harris and Klebold were both fans of shooter video games such as "Doom", "Quake", "Duke Nukem 3D" and "Postal". A file on Harris's computer read the massacre will "be like the LA riots, the Oklahoma bombing, WWII, Vietnam, "Duke" and "Doom" all mixed together." In his last journal entry, Harris wished to "Get a few extra frags on the scoreboard." After the massacre, it was alleged Harris created "Doom" and "Duke Nukem 3D" levels resembling CHS, but these were never found.