Has both good and bad additions...
I welcome many of the additions to the series. Conquests adds many new cool units, buildings, wonders, and civilizations to the game. It also improves Civ III in many other ways, such as creating upgrade paths for units that were lacking them (swordsman, etc.). It also adds several missing music tracks to the game, such as the Mid-East and European Modern Era music.
Unfortunately, however, not everything new in Conquests is good. The biggest of these is the technology change for trading of communications and world maps between civs. Now, instead of being able to trade these wonderful items early on in the game, you have to wait until very late in the game. What the heck was Firaxis thinking??? Now the ancient era is so boring. Also, there is still one music track that is missing: the Industrial Era music for American civilizations.
Regardless, the pros of this expansion outweigh its cons. It is definitely worth getting, especially if you are a big fan of Civ III.
Gameplay: 9
Graphics: 9
Sound: 9
Value: 10
Tilt: 8
Overall: 9.0\10 (superb)