Ultima Underworld 1 & 2 and Dungeon Keeper are also available at the same price.
More games from Electronic Arts' back catalog will be available soon, starting with another set of three at the end of June. These games will be Crusader: No remorse, Sid Meier's Alpha Centauri and Magic Carpet.
GOG does not have the rights to every Origin game--there are licensing issues preventing the release of System Shock.
Privateer is the CD ("talkie") version but does not include Righteous Fire at this time. That may change in the near future.
Privateer includes the game's manual and reference card as downloadable PDFs.