Rainbow Six 3 is a tactical shooter game DEVELOPED by UBI. The game is a first person shooter based on Tom Clancy's best selling novel by the same name. The game has two expansion packs, Athena Sword and Iron Wrath. The plot of Ravenshield is fully explained by Wikipedia (Tom Clancy's Rainbow Six 3). Basically it is all about an elite anti-terrorist group called Rainbow Six, a team bent on foiling the Neo-Facist terrorists doing damages on South American oil interests and European financial institutions.
Take part in Team RAINBOW as they're led all over the world in epic, tactical operations. The single-player demo allows you to join the Oil Refinery mission utilizing sixteen weapons in all four game modes. (Practice,Terrorist Hunt, Lone Wolf, Hostage Rescue).