Summary: Since the makers of the original SimCity 4 never actually fully patched that version, they tell you to buy Rush Hour to solve the issues existing with that main version. Throwing in a few additions that could have been made available for download, you must buy this expansion in order for the game to even work with ANY future elements they may provide. Newer building tools or the rare new structure will simply not work with the stand alone version.
Summary: First of all i do not recommend buying this game. It is a little pricy and its not very good. It is IMPOSSIBLE to get even 10,000 people in your city!! Its so hard! Also it does not have any of the good things like in Sim City 3000. ( look at the chart Finally I DO NOT recommend that you buy this game. Buy Sim City 3000!! actully i can't tell you what to do so i guess this has changed your mind on wasting 40$ and alot of frustration. I HATE THIS GAME.