Here's a launch trailer for Monolith Productions' on-line shooter Gotham City Impostors which launched today on PC, 360 and PS3 for £11.99 or the equivalent of MS points.

"Gotham City Impostors is a unique first-person multiplayer shooter that delivers a completely different Batman experience that is irreverent, fun and humorous," said Samantha Ryan, Senior Vice President, Production and Development, Warner Bros. Interactive Entertainment. "The game is unlike any other on the market today and gives fans the opportunity to play the game in whichever way they want to play. We can’t wait to see reactions from players wreaking havoc in Gotham City."