OpenIV, a popular modding tool used by tons of GTA V fans, is shutting down. After nearly 10 years of operation, the creators claim they have received a cease and desist from Take-Two Interactive -- the publisher of Grand Theft Auto. The news has shocked the PC Grand Theft Auto community, who use OpenIV to add thousands of mods into GTA V. Many upset modders have retaliated by flooding GTA V with negative reviews on Steam. Kotaku reports: According to a post on the official OpenIV website, the alleged cease and desist came on June 5th 2017. The supposed problem, OpenIV's creators say, is that the program allows "third parties to defeat security features of its software and modify that software in violation Take-Two's rights." After discussing their options, the team behind the tool says they decided it was not worth their time to fight back. "Yes, we can go to court and yet again prove that modding is fair use and our actions are legal," creator GooD-NTS wrote. "Yes, we could. But we decided not to. Going to court will take at least few months of our time and huge amount of efforts, and, at best, we'll get absolutely nothing. Spending time just to restore status quo is really unproductive, and all the money in the world can't compensate the loss of time. So, we decided to agree with their claims and we're stopping distribution of OpenIV."