Here is the full list of all 10 Kraken Odyssey achievements.
You have just unlocked your first medal, congratulations!
You have just unlocked 10 medals, well done!
You have just unlocked 100 medals, you are fast !
3 stars, only 93 more to go, keep going!
50 stars, take a break!
Soon as many as in a galaxy, or not.
You have defeated the first boss, congratulations!
You have defeated the second boss!
Third world defeated, It's getting serious now!
You know how to save gold, now it's time to buy a hat!