To unlock the Rustic Park on roar, you just need to play 'Feeding Time'
teddy65443
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you just type in 52869649pets0969458
I'm not sure what the rustic cheat code is (sorry) but i know that its out because i unlocked it not too long ago but I've started a new park now. I know the enclosures cheat codes which are: Sun17 Air9 Moon9
Just type in a ROAR code
To get the last park exterior on roar you have to answer a question or try cheat codes, if you type on your computer what are the roar cheat codes then when it comes up go on the second link on the first page and it will give you all the cheat codes and what they unlock. not quite sure when the question is though :)
you do
the answer to get the ice world on roar is a one and a five
Type in air199
frost45
Crystal888