Parental Warning: This game has been rated M (Mature) by the ESRB and is not suitable for players under the age of 17. Engineered specifically for the PC, Rainbow Six returns to deliver the most nail-biting close quarters combat ever experienced online. In Lockdown, the Rainbow team faces independent terrorist threats tied together by one common element - the Legion virus. Rainbow must determine the connection between the terrorist threats and the virus in truly immersive tactical gameplay. Rainbow Six - Lockdown boasts a superior multiplayer experience, enhanced tactics, a new user interface, and new maps.