Viral marketing strategies were used to promote the game. Wanted posters were placed around New York City promoting the game's characters and website; billboard versions were also posted throughout the city. Murals and posters advertising the game were placed on buildings and public transport. The Chicago Transit Authority (CTA) removed advertisements promoting the game from their property in April 2008; Take-Two filed a lawsuit in response, claiming that the CTA had violated a contract. Visitors to the website of WKTT Talk Radio—a fictional radio station within the game—were offered a chance to leave a voice mail message stating their problems. Prior to leaving the message, callers were asked to read the terms and conditions, which revealed that some of the voice mail message would be selected for use in the game.