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