On Zoo Tycoon 2, when you complete all of the campaign games, what do you get?

Answer 1

You dont get anything special just for finishing them all but you do get a prize for each individual group of them you finish. You can look at what you get by either looking at the description of them in the campaign section, or when you are in a game you can go to prizes and awards and it has a list of things you can win and how you win them!
Goodluck on beating them all! :)

Answer 2

Flower Arch Complete all scenarios in Troubled Zoos campaign
Flowerpost Complete all scenarios in Zookeeper in Training campaign
Gilded Panda Statue Complete all scenarios in The Mysterious Panda campaign
Globe Statue Complete all scenarios in The Globe campaign
Mysterious Panda Campaign Complete all scenarios in Conservation Programs campaign
Sundial Statue Complete all scenarios in Prevent Animal Abuse campaign