Public concerns about youth violence, including school shootings, have escalated since
the 1999 Columbine shootings in Littleton, Colorado. Table 1 provides a timeline for the
evolution of video games with increasing violent content. Many violent games became popular
in the years prior to Columbine, including Doom and Resident Evil, two games well-known for
their use of guns, brutality and gore. The two Columbine perpetrators, Dylan Klebold and Eric
Harris, were fans of Doom, and many media features speculated about a connection
between playing the violent game and the massacre.