Everyone should buy this game. Amazing.
You are a god. Not a creator, really just a holy or unholy presence capable of interfering with the world in many ways. Miracles, throwing stuff, using a creature, etc.
There is the main campaign. You have to complete many tasks, some mandatory, some you can do if you want to. But what's really nice, you can complete the tasks the way you want to! You can impress, heal, and build or crush, kill and destroy! There is also a nice good-evil-meter that changes you and your property depending on what you do. This game is so much and offers so many choices, the variety, I don't want to say much more. It's amazing.
Graphically it's impressive - it runs on my 333Mhz computer even if it looks nearly as good as Black and White 2! Seriously, the graphics are more than comparable to today's strategy games.
The sounds and overall atmosphere is ecstatic. The composer is a genious, and even if the range of sounds is a bit limited, you don't get tired of anything.
In addition to the regular gameplay, you have the playground, skirmish and multiplayer to play around with. You can spend a lot of time with your creature which is a really good virtual pet or enjoy the everlasting fun with taking over villages.
Even if I've owned this game since around 1999, I completed it in 2005(Because of several strange events in the meantime). It is rather hard, and also very long. Requires some patience, but that doesn't kill any value.
Perhaps the best game I have ever played.