Gearbox Studios, who bought the rights to Duke Nukem, is now suing the former IP owner 3DRealms and developer Interceptor Entertainment for unauthorized use of the Duke Nukem property and alleging violation of its trademarks. The lawsuit is related to 3D Realms' recent reveal of Duke Nukem: Mass Destruction, which currently features a teaser site with a timer counting down to February 25.
"Apparently, after selling its Duke Nukem IP rights to Gearbox in 2010, 3DR sought to privately convince others that the sale never happened," the complaint reads. "The result is the unauthorized development effort that reportedly exists between 3DR and Interceptor."
The court filing includes a breach statement issued by Gearbox stating that 3D Realms infringed on Gearbox's intellectual property in addition to a statement signed by 3D Realms CEO Scott Miller and Duke Nukem co-creator George Broussard, who acknowledged the infringement.
The last time the two companies had a public brawl was back in June of last year when 3DRealms sued Gearbox claiming that it was owed royalties for Duke Nukem Forever. 3DRealms later withdrew the lawsuit and publicly apologized to Gearbox for it in September of that year.
Gearbox purchased the rights to and took over the development of Duke Nukem Forever in September 2010 from 3D Realms.
You can read the court filing here.