LittleBigPlanet

Is this even a game or is it part of home?

of course its a game. I imagine that when it releases it'll be $60. from what I can gather watching game trailers, developer commentaries, and developer interviews, littlebigplanet is a platformer. each world is a level, which you must guide your character from the beginning to the end of. the game can be played with other people controlling the four separate characters, or you can control all of them. just think of it like a super interactive super mario. however, what sets his aside from other platformers is that you can create your own levels using the same tools the developers used to create the levels already in the game - then you can publish them to playstation network and other people can play them.
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"Only a fool looks for logic in the chambers of the human heart." - Ulysses Everett McGill

http://boards.gamefaqs.com/gfaqs/genmessage.php?board=938583&topic=40053867

Short version is that it will most likely cost $60 (U.S.) and it is all about creativity. You can customize the way your sackboys look and then make your own levels with an extensive level editor. If creating isn't really your thing, then there will also be developer made levels included on the disk as well as a constant stream of new levels being uploaded online from everybody else who bought the game and created their own levels (you can share them online.)
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Number of people who fail to know what a troll really is: 17 . . . so far.

And yes there will be some things to do with Home, but we don't know what they are yet but they are not the main part of the game.