Spore is a bit incredulously ♥♥♥♥♥♥♥♥.
It introduces something amazing, an entirely new concept with you, but when you get about halfway through the game it takes that all away from you with hardly any reason or meaning why.
Playing a new game, you start as a little microbe thing with some very basic gameplay and some addictive mechanics. The goal of this stage is to eat and get bigger until you fill up the meter at the bottom, it's promising but gets boring fast which is just as well because the stage can be over that fast if you want it to be and you can move on to become a proper Spore creature, going into Creature stage.
Creature stage... is the best part of the game. This is the part where you're shown an almost infinite variety and customizability combinations in the creature editor, with all sorts of interesting options and different things. You can make a four or six legged monstrosity with ♥♥♥♥ing spikeballs coming out of it's nose or maybe a ball with a pair of legs and four arms, with a ridiculous variety of hands, mouths, eyes, assortments of weapons and the likes.
And if that didn't already appeal to you, on top of all this, you're shown an expansive world with other species which you can befriend or extinct and giant ♥♥♥♥ing creatures you can attempt to slay if you get powerful enough for thrills. And this courses through an ENTIRE PLANET of these other species and massive creatures. This appealed to me so much that I absolutely loved everything about it, it was so thrilling, it was absolutely majestic and wonderful.
But then comes Tribal stage. Once you're filled on the meter at the bottom and maybe have the full look for your creature that you want, the content was pretty stunted there. Personally, I would have loved to have the whole game be Creature stage, just getting progressively better.
Instead, it's all taken away from you. You're shown an entirely different genre of game in some sadistic attempt to radically change your idea on playing the game. Initially, I dismissed this as EA's standard policy to alienate their entire ♥♥♥♥ing demographic and tried to make sense of it, but no.
Your love that you put into your creature to maybe make it more socially friendly or combat advantageous in Creature stage? Poof. The only things you retain from Creature stage are the actual planet (which is no longer free-roam), the other species on it (now lowered to domestic pets and other rising tribes which are pretty generic and bland) and the look of your creature as well as it's voice and how it moves (like if you have a four-legged creature, it moves the same way it did when you were controlling it yourself, but it's generic and loses it's charm). The whole game turned into this forced, linear pathway that is completely different from what was shown to you earlier.
Tribal was pretty short, though. Civilisation stage... Ugh. It introduced an entirely new editor, but it was like it was trying to shoehorn user creativity back into the game, but with no real purpose. The things in Creature stage were actually relevant to the gameplay, like combat and social, with the other idea of it being whatever the ♥♥♥♥ you want and it can apply to the actual gameplay, like moving on. While Civilisation stage things do have the element of application to gameplay, it's just less and less content. There's only the coolness in making vehicles. That's it.
Space stage is another step where the Civilisation stage was going in the first place, you deal in planets instead of nations/cities, you deal with a galaxy instead of a world... It's incredibly boring, though. There's combat segments and some customization, but the game lost all charm for me at this point.
But yes, if you agree with everything I said and want to buy the game, then NEVER progress past Creature stage unless you REALLY want to. It's not that rewarding. Incredible beginning content with incredible mechanics, but really sucks later on.