Tom Clancy's Splinter Cell: Double Agent (PC, PlayStation 3, Wii, Xbox 360), the fourth installment in Ubisoft's Splinter Cell series, has been out for almost a year now. That hasn't stopped Ubisoft from releasing downloadable content for the game's Xbox 360 version though.

Two new Splinter Cell: Double Agent multiplayer maps - Kinshasa and Secret base - are now available for download over Xbox Live. These maps also bring with them four new challenges. There's also a brand new character, the Spy Girl, who comes with three different outfits.

It might be late, but the best thing about this downloadable pack is that it's completely free. The pack is available for all regions with Xbox Live support, so download away.