EA marketing insists it's evolution, which is far from the truth. However, it does draw inspiration from a number of scientific concepts that the public do not often get t play with.
It's a playground, sandbox universe with optional goals and mission structure, especially early on. Played from beginning to end, you guide a species through its evolution from a single-celled organism, to macroscopic creature, to sentient being. From there it's tribal, civilisation and finally space exploration.
Significantly, you design most of the game's assets. There are editors for creatures, vehicles, spacecraft, buildings and more. As you play through the game you progressively gain access to more (and lose access to others for a while), modifying your creature every generation, designing you city's buildings and vehicles, crafting your space ship and manually bootstrapping worlds to your requirements.
Also, your designs are uploaded to the Spore servers and downloading into other people's games automatically to populate their ecosystem and universe with whatever is required. It's still single player, but you interact with other people's civilisations (and can destroy them without ruining the creator's game). That's Spore in a nutshell. It's out this September, but the Creature Creator is out now.
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