London - A group of video game publishers that includes Atari and Codemasters is preparing to launch a legal campaign against illegal downloading in the U.K., similar to the route taken by the RIAA in the U.S. The London-based law firm of Davenport Lyons intends to send the same type of "pre-litigation settlement letters" employed by the RIAA to 25,000 suspected game file-swappers in the U.K., giving them the opportunity to pay 300 pounds ($558.36) to avoid a lawsuit.