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