Here is the full list of all 32 A Pixel Story achievements.
Complete The Volcano
Complete The Bayou
Complete The Temple
Successfully Cache Using The Hat
Complete The Valley
Get Dressed For Your Adventure
Remain Awake Long Enough To Learn The Veteran's Identity
Input The Sacred Code At The Secret Location
Return To The Bayou To Witness The Glorious End Of A Great Mech
Discover The Secret Identity Of Kelly The Canary
Have You Really Got The Time To Be Bouncing Around In Here?
Free The Blue Creature And Look At Him Go!
Complete The Forest
Either You Have Gone To Make A Brew, Or You Are Completely Clueless As To How To Do This Puzzle. Either Way, Have An Achievement
Complete The Lab
Enter The City And Bring Down The Tyrannical Operator
Scour The System And Find The Iconic Items
Use Your Hat To Cache 2048 Times
Locate And Destroy The Miniature Castles Hidden Across The System
I Agenda, You Success
We Won't Sting You For Hidden Extras, Have Some Useless And Possibly Detrimental Add-Ons For Free
Find And Collect Every Coin In The System
Purchase, Enter And Complete A Challenge Room
Complete A Challenge Room With 'A Strange New World' Activated
Complete The Challenge Room Death Run
Free The System Faster Than The Devs
Complete All 15 Challenge Rooms In Story Mode
Find And Collect Every Piece Of Memory Throughout The System.
You Are Not Special. You're Not A Beautiful And Unique Pixel. You're The Same Decaying Digital Matter As Everything Else
Achieve A Score Of 2000 Whilst Riding Kevin
Wow the Kernel's Party Guests By Reaching A Score Of 5000
Help Gus Fight Off His Wayward Offspring By Reaching A Score Of 400