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.
While not really useful or cool I managed to change the color of your HUD in MP and reticle colors.
EDIT: I've also managed to make a "blue team" which displays blue team and is blue but does still say gold team quotes, going to have to see about taking audio from older R6 games to get some blue team audio.