Full list of all 26 Kao the Kangaroo achievements.
The base game contains 15 achievements, and there is 1 DLC pack containing 11 achievements.
Have 20 lives in total
Finish the game
Beat the Eternal Warrior
Defeat one of the Bosses without receiving any damage
Collect All Eternal Runes
Collect KAO letters on all Levels
Unlock all extra heart slots
Find and complete all of the Eternal Wells
Collect all Kaopedia entries about Foes
Defeat the Oldest One
Defeat the Jayabaya
Defeat 5 enemies at once with finisher
Find and defeat the Terror
Wear an outfit from Kao 3
Complete a tutorial with Walt
Complete Waterfall Islands (Easy Mode)
Complete Waterfall Islands (Hard Mode)
Complete Volcano Peaks (Easy Mode)
Complete Volcano Peaks (Hard Mode)
Complete Forsaken Monastery (Easy Mode)
Complete Forsaken Monastery (Hard Mode)
Complete Twisted Hideout (Easy Mode)
Complete Twisted Hideout (Hard Mode)
Defeat the Crab King
Collect every diamond in the Bend the Roo'les
Find the Frozen Pirate from Kao 2