Here is the full list of all 10 amazin' George 2 achievements.
Welcome to the world of Felina, meow!
You've defeated your first enemy!
Very skillful, meow!
Treat George and keep battling!
Get a game over at least once. Save often, meow!
Buy an item from a shop.
Sometimes it's okay to flee from monsters!
Phew, you've saved our progress!
Change the settings to your liking, meow.
Critical hit a foe.