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