Here is the full list of all 39 TY the Tasmanian Tiger achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
You got 100% of everything! (HardCore)
You got all the Rainbow Scales
You found all the Picture Frames!
You didn't miss with a single boulder!
Hit Lenny with the Flamerang 15 times
Set a best time with the Chronorang equipped.
Run out of lives. So sad...
Get a thunderegg from a turkey using a super bite
Defeat 200 enemies using your Bite
Defeat 75 enemies with the Zappyrang
You got 100% of everything!
Hit Shazza with the Flamerang
You got the Chronorang
Get all the boomerangs
Burn 50 Cricket Bats
You found all the Bilbies!
You found all the opals!
Completed All Time Attacks
You got the Kaboomerang
You got the Megarang
You got the Infrarang
You got the Multirang
Defeat 100 enemies with the Flamerang
You learnt how to swim!
You got the Zoomerang
Bite a leech.
You got your second rang!