Here is the full list of all 24 Smile For Me achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Forgive and forget.
Find the Duck’s true owner
Find an alternative route
Some crimes can’t be forgiven.
No thank you ma’am
Leave unfinished business at the Habitat
Escape the Habitat
Satisfy every habitician
You really went and did it, huh?
Accept a smooch
Find every diary page
Satisfy 15 habiticians
Dispose of the Duck
Grip a Y’owl for Borbra
Clean Kamal's teeth
Unlock the Terrace
Discover a hidden sweetheart
Get a very high score at Whack-a-Molar
The secret’s out...
Help a friend in need
Unlock the Lounge
Unlock the Carnival
Hit Ronbo with a golf ball
Satisfy a Habitician