Here is the full list of all 45 Zoo Rampage achievements.
Run over 5000 visitor
Run over 2500 zookeeper
Play as a snow tiger
Play as a polar bear
Run over 2500 visitors
Play as a phyton
Play as a crocodile
Eat 500 fish
Shoot 50 goals
Destroy 10 balloon stands
Destroy 10 hot dog stands
Destroy 15 toilets
Play as a tiger
Finish all levels
Finish the "Free Fish" level
Eat 250 fish
Start the "Free Fish" level
Play as a penguin
Run over 500 visitors
Finish the "No Escape" level
Start the "No Escape" level
Play as a giraffe
Run over 250 zookeeper
Finish the "Outbreak" level
Start the "Outbreak" level
Play as a rhino
Finish the "Arctic" level
Destroy 5 gas tanks
Start the "Arctic" level
Play as a reindeer
Finish the "Jungle" level
Destroy 15 trees
Start the "Jungle" level
Play as a gorilla
Get over 9000 points
Finish the "Africa" level
Finish any destruction level
Scare 50 visitor
Start the "Africa" level
Play as a zebra
Shoot 25 goals
Run over 10 visitors
Finish the "Soccer Match" level
Start the "Soccer Match" level
Play as an elephant