Here is the full list of all 46 Sackboy: A Big Adventure achievements.
Even Scarlet didn't get all the achievements, you're truly a Knitted Knight of legend.
Get a Gold on the Knitted Knight’s ultimate trial.
Find and pick up every fish, paintbrush and cocktail umbrella on your journey.
Show off what you've learned and finish the Wonderplane's final challenge!
In multiplayer, get gold in any Knitted Knight Trial while carrying another Sackperson.
Earn a Gold rank in any Knitted Knight Trial.
Create your own custom Emote in Zom Zom's shop then show the world.
In multiplayer, high five with a friend.
Team up to take down the Topsy Turver.
Defeated Vex, destroyed the Topsy Turver and saved Craftworld!
Triumphed over the vile Vex at the very centre of Craftworld.
Find all of Gerald's secret spots.
Complete Highs and Glows... without throwing the Whirltool.
Pick up and throw 30 of Vex's minions to their doom.
Cleaned up N.A.O.M.I's code.
Earn Gold on the scoreboard in 50 different levels!
Defeated the Bringer of Nightmares at the bottom of the ocean.
Collect all the stickers in a single World.
In multiplayer, save your fallen friends from certain doom!
Ace 30 levels by completing them without dying.
In multiplayer, start a dance party with your friends.
Stun 30 of Vex's minions.
In multiplayer, snag the most Collectabells in a level 20 times.
Cleared the Colossal Canopy of its pest problem.
In multiplayer, get the top score on the scoreboard 20 times.
In multiplayer mode, earn 10 Ace level goals.
Defeat multiple minions simultaneously 10 times.
Defeat 30 of Vex's minions from a distance.
Achieve all the level goals for 10 different levels.
Over the course of your adventure, collect 3000 points while sliding.
Fill your wardrobe with 300 costume pieces.
Defeat 30 of Vex's minions by bouncing on them.
Faced off against the Master of the Uproar on the Soaring Summit.
Pick up, and hold on to, a Boomblebee Hive for 60 seconds.
Collect a full chain of Timed Score Bubbles 30 times.
Earn a Gold rank in any Remix level.
Complete your first Costume.
Discover the Trials of the Knitted Knights.
In multiplayer, complete a Teamwork Level.
In multiplayer, clobber one of your chums as the champ.
While in the air, perform four actions before touching the ground.
In multiplayer, snatch an item from the clutches of another player.
Simultaneously slap each other.
Save a custom-made costume to your Wardrobe.
Pushed back the Uproar for the first time.
Get a golden level badge by completing all the Level Goals for a single level.