Ubisoft has released a free map pack for Tom Clancy's Rainbow Six Vegas 2, the sixth iteration of the multimillion-selling Rainbow Six tactical shooter franchise. There are three maps included in the free map pack: Murdertown - Dark, CQB Training - Dark and Calypso Casino. The three map layouts have not been changed. The re-lit "Dark maps" have a very eerie atmosphere, and may require players to use night vision to spot enemies. Calypso Casino returns with updated lighting and textures. The three maps are playable in all Versus modes and Terrorist Hunt.