Ubisoft today announced that Tom Clancy’s Rainbow Six: Lockdown, the fourth installment of the popular series will ship worldwide in September 2005, for PS2, Xbox and GC. In the works at Red Storm Entertainment, the PC version is scheduled for an early 2006 release. An US IRC Chat will take place on May 12, 2005 at 5 pm (San Francisco time). During this hour session, fans will have a chance to ask in-depth questions to members of the development teams. Details - IRC Network: irc.gamesurge.net, public IRC Channel: #rainbowsix.