I already owned all the expansion packs except the last one, so I knew what I was getting. This game is so fun, from planning your zoo layout, to filling it with animals in their appropriate habitats, to making your zoo profitable. Quests and challenges are great, as is free play. I played it when it was a new release years and years ago, and I still play it now. The freeplay (unlimited cash) game is easy enough that my 5-year old son can play, even though he doesn't read, but it can be challenging enough for an adult when following objectives. I will continue to play this game for many more years still, I'm sure. Xbox recently released their newest version (only available on their console), but my heart is with this game.