Spore is a life sim in the most literal sense of the word. You are simulating life itself. The game is broken up into 5 main "Stages" each acting as a different self contained type of game. There is a lot of replay ability, seeing as, one you know what your doing, you can go from Cell Stage to Space stage in about 5ish hours.
Currently getting footage, since the replay ability is the main thing, and working on scripting since I'm currently away from my main computer