Black & White

This is a game like nothing else.
You are [a] god and can do whatever you like (within the limits of the game).
As a god, you may perform miracles. Miracles do not happen by clicking buttons; you need to perform mouse gestures (which caused me much grief back then).
You also must choose an animal to represent you. The animal can be anything from a cow to a tiger, but it has to walk on two legs. You can train your animal by walking it on a leach and punishing/rewarding it when it does something you dislike or like. The training AI is rather advanced, so you can train your animal only to eat female humans and stop pooping everywhere or leash it to a human granary and let it perform food miracles.
The humans are yours to do with as you please. Some are sturdy, and you can attempt to drown them, yet they stay alive. Throw a stone into a village, and the villagers may see it as an act of a god and start worshipping it. You are nothing if people don't believe in you. Eventually, you may need to run a worshipping factory with human sacrifices to keep your power up. You might also need to pair the humans, as they are too stupid to work out that part alone [produce new humans].
Fun game. I remember it had some quirks and crashed from time to time. Still great.