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.
Show off what you've learned and finish the Wonderplane's final challenge!
Collect all the stickers in a single World.
In multiplayer, get the top score on the scoreboard 20 times.
In multiplayer, start a dance party with your friends.
In multiplayer, high five with a friend.
In multiplayer, clobber one of your chums as the champ.
In multiplayer, snatch an item from the clutches of another player.
Simultaneously slap each other.
In multiplayer, get gold in any Knitted Knight Trial while carrying another Sackperson.
In multiplayer, complete a Teamwork Level.
In multiplayer, snag the most Collectabells in a level 20 times.
In multiplayer, save your fallen friends from certain doom!
In multiplayer mode, earn 10 Ace level goals.
Team up to take down the Topsy Turver.
Ace 30 levels by completing them without dying.
Pick up, and hold on to, a Boomblebee Hive for 60 seconds.
Find all of Gerald's secret spots.
Find and pick up every fish, paintbrush and cocktail umbrella on your journey.
Pick up and throw 30 of Vex's minions to their doom.
Complete Highs and Glows... without throwing the Whirltool.
Stun 30 of Vex's minions.
Earn Gold on the scoreboard in 50 different levels!
Create your own custom Emote in Zom Zom's shop then show the world.
Defeated Vex, destroyed the Topsy Turver and saved Craftworld!
Triumphed over the vile Vex at the very centre of Craftworld.
Cleaned up N.A.O.M.I's code.
Defeated the Bringer of Nightmares at the bottom of the ocean.
Fill your wardrobe with 300 costume pieces.
While in the air, perform four actions before touching the ground.
Defeat multiple minions simultaneously 10 times.
Cleared the Colossal Canopy of its pest problem.
Achieve all the level goals for 10 different levels.
Defeat 30 of Vex's minions from a distance.
Defeat 30 of Vex's minions by bouncing on them.
Over the course of your adventure, collect 3000 points while sliding.
Collect a full chain of Timed Score Bubbles 30 times.
Faced off against the Master of the Uproar on the Soaring Summit.
Earn a Gold rank in any Remix level.
Complete your first Costume.
Earn a Gold rank in any Knitted Knight Trial.
Discover the Trials of the Knitted Knights.
Get a golden level badge by completing all the Level Goals for a single level.
Save a custom-made costume to your Wardrobe.
Pushed back the Uproar for the first time.