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.
The patch that fixes all UBISoft's mistakes! Required for ALL online play. Version 1.1 also allows mods to work in single player properly. Requires EITHER the Steam version of Raven Shield OR the CD version patched to 1.6.
Is this compatible with 2.0 also?
No idea, I think it should be but I've never tried. Theoretically it should all work. I think the Srgt clan ran a 2.0 server for a while.