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