On July 19, 2007, Silicon Knights sued Epic Games for failure to "provide a working game engine", causing the Ontario-based game developer to "experience considerable losses." The suit alleged that Epic Games was "sabotaging" Unreal Engine 3 licensees. Epic's licensing document stated that a working version of the engine would be available within six months of the Xbox 360 developer kits being released. Silicon Knights claimed that Epic not only missed this deadline, but that when a working version of the engine was eventually released, the documentation was insufficient. The game studio also claimed Epic had withheld vital improvements to the game engine, claiming they were "game specific", while also using licensing fees to fund development of its own titles rather than the engine itself.