In a suit filed in a Maryland U.S. District Court, Bethesda alleges that Westworld — developed by Behaviour — “has the same or highly similar game design, art style, animations, features and other gameplay elements” as Fallout Shelter and Westworld illegally "uses the same copyrighted computer code" as Fallout Shelter. Bethesda sued for copyright infringement, breach of contract and misappropriating trade secrets, seeking a jury trial and damages. By January 2019, Bethesda announced it had reached an agreement with Warner Bros. and Behavior with undisclosed terms, halting its lawsuit against them.