This game is possibly the best zoo simulation game on the internet. First, you have to pick the environment you want. From Costa Rica to Himilayas (heck, even a crater). Then, you have to build your whole zoo from scratch. No, not one of those crappy iphone apps where you get a colossal enclosed area and you just tapped on animals to feed them (and somehow get money from the animals), you have to actually BUILD it.
This brings me to one of the bad things about the game; The prices are insanely off-bordered. A pig costs 10 dollars, while an extremely rare Napoleon Wrasse from a DLC costs 48 dollars. In real life, the Napoleon Wrasse would cost thousands.
Anyway, after you start adding pens, you can put animals. They start off pretty hungry and possibly near-death, so what do you do? Either abuse the system and buy 1,000 lemon trees for cheap, or get a greenhouse for 500 dollars.
Once you get an entrance, you can open up the zoo for visitors.
Brings me to another bad thing; every visitor is so picky I can't even laugh about it.
If you have the Crazy Zoo DLC, every single kid will not stop whining about wanting to climb something. Sometimes, I just put them in with some monkeys and tell them to climb the monkey slide. It's so annoying.
You can put a wide variety of machines for visitors to use, like vendors, shops, and other stuff to take all of their money. Then, they complain to you that they ain't got no money. What do you do? Well, you have them take your money from an ATM and re-pay the same amount! YAY!
Also, they want to pet the "cute" animals. Even if you only have dead anglerfish around, they want to pet cute animals. It's so freakin' annoying.
Notheless, this game is great, and I recommend it.