Here is the full list of all 15 Wild Animal Racing achievements.
Overall medal in world tour
For winning gold as a rhino!
For coming first in a race
For winning gold as a zebra!
Overall medal on the roads!
Unlocked a movie!
Completed a race
For winning gold as a giraffe!
For winning gold as a hippo!
For winning gold as an elephant!
For winning gold as a lion!
Two players come first and second in a split screen race.
Overall medal in Magical races.
Overall medal for rally driving!
Secret easteregg uncovered!