Here is the full list of all 35 WHALIEN - there are Unexpected Guests achievements.
Unlock All Achievements
Leave the Comforts of your Home
Encounter the Tentacle
Reactivate the derelict Fish-Pump
Complete the Mr. Push Training Course
Complete the Mrs. Pull Training Course
Take a Detour through the Sewer
Fire up the Algae processing Chain
Make it out of Algae Alley
Get the Pantry up and running again
Solve the Problem in the Kitchen
Discover the Lounge in the Star Restaurant
Navigate the Bunny Squiddie to the Dishwasher
Complete your Adventure
Collect your first Sticker
Collect 21 Stickers
Collect 42 Stickers
Complete all Requests
Use every Fantilator that you come across
Talk to 30 different Springpeople
Visit every Store on your Journey
Have all Members of The Seastar play out of Tune at the same Time
Obtain your first Ability
Obtain all Abilities
Have Mrs. Pull influence 25 Objects at the same time
Have Mr. Push influence 25 Objects at the same time
We all make Mistakes...
Open a Door the permanent Way
Witness a Springpeople make an energizing Catch
Show the Monkey Squiddie your favourite Book
Bring a Carrot to a Tentacle Fight
Annoy the Bunny Squiddie with one of your Pearls
Feed the Tentacle all Items from the Candy Machine
Have the giant Bunny Squiddie eat you
Defeat 150 Squiddies