A group of Roblox users known as Active Shooter Studios — or A.S.S. — has been re-creating real-life school shooting tragedies on the popular gaming platform, including events like the Columbine High School massacre and the 2022 shooting at Robb Elementary School in Uvalde, Texas.

According to a report from the Anti-Defamation League’s Center on Extremism, A.S.S. has attracted hundreds of followers on Roblox through its highly detailed, graphic re-creations of these incidents. The group’s influence has also spread to other platforms, including a private Discord server, TikTok, and Reddit. A YouTube video shared on the A.S.S. Discord server even introduced a game based on the 2007 Virginia Tech shooting, featuring live footage from the attack and garnering dozens of comments.

The ADL report highlights that A.S.S. specializes in disturbingly accurate maps designed to replicate mass shootings with unsettling detail and gore. The group is part of a broader online subculture called TCC (True Crime Community), whose followers often display a fascination with serial killers and mass murderers.

Until recently, A.S.S. also operated an 800-member Roblox group used for announcements and promoting its Discord server. Roblox Corporation said it shut down the group last Friday after being alerted by the ADL.

“The maps created by A.S.S. are not simple game environments — they are disturbingly graphic and detailed, designed to mimic mass shootings with unsettling accuracy,” the ADL said in its report.

In A.S.S.-created games observed by Bloomberg, players’ avatars gathered in re-creations of events like the Columbine shooting, wielding pitchforks and chanting the White supremacist slogan, “You will not replace us.” Armed players shot at students, while others dressed as police attempted to take them down. Although Roblox removed this game, a new A.S.S.-linked shooter game appeared the same day, drawing over 1,000 visits before it too was removed.

Roblox emphasized that it enforces strict community standards prohibiting content that promotes or glorifies extremist organizations or violence.

“We take steps to remove violative material and accounts detected by our AI systems, flagged by users, or flagged by external organizations,” a Roblox spokesperson said.

Discord also said it maintains a “zero-tolerance policy” toward glorification of violence. The company confirmed it had already removed the A.S.S.-related server and multiple user accounts prior to the ADL’s report.

TikTok stated its guidelines prohibit the promotion or incitement of violence, including the praising of violent acts. Representatives for Reddit and YouTube did not immediately respond to requests for comment.

The leaders of the A.S.S. community could not be reached for comment.

Roblox, which draws about 85 million users daily — many of them children — has faced ongoing challenges in moderating harmful content. It has previously been criticized for failing to adequately protect users from sexual predators and for the appearance of games inspired by real-world mass violence, including a recreation of the 2019 Christchurch mosque shooting.

The company noted that the vast majority of users do not seek out this type of content and that its discovery mechanisms make it unlikely for the average user to encounter it.

“Combatting content that supports extremist views is an internet-wide challenge,” Roblox said. “These individuals constantly try to evade detection.”

Roblox says it works closely with organizations like the United Nations-supported Tech Against Terrorism initiative and the Simon Wiesenthal Center, the latter of which gave Roblox high marks for its efforts to moderate hate online.

Despite takedowns, A.S.S. continues to find ways to distribute its content. According to the ADL, the group now uses paid private servers on Roblox, which limit access to invited players only — making detection and enforcement more difficult.