Full list of all 71 LEGO Worlds achievements worth 1,345 gamerscore. It takes around 50-60 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 61 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 10 achievements worth 345 Gamerscore.
Blew up another player with a ridden Dragon fire ball
Found the Legendary 2x2x3 Slope Brick
Found the Legendary 2x4 Slope Brick
Played all the musical note bricks within 10 seconds
Found the Legendary 1x4 Slope Brick
Found the Legendary 2x3 Slope Brick
Found the Legendary 1x3 Slope Brick
Found the Legendary 2x2 Slope Brick
Collected 100 Gold Bricks
Found the Legendary 1x2 Slope Brick
Found all the Biomes
Skydived uninterrupted from the highest point possible to the lowest point possible!
Found the Legendary 2x4 Brick
Played bagpipes to a brown bull
Found the Legendary 2x3 Brick
Found the Legendary 2x2 Brick
Found and walked around a Town
Found the Legendary 1x2 Brick
Collected 60,000+ studs in a single streak (no more than 2 seconds between each stud collected)
Found the Legendary 1x1 Brick
Collected 80 Gold Bricks
Played an instrument next to another player playing a different instrument
Collected 65 Gold Bricks
Defeated 7 enemies in a streak (with a maximum 12 second gap in between)
Found a Dungeon
Chased down and rode a Sheep
Collected 50 Gold Bricks
Took a picture of a posing character
Rode a Badger
Had 5 squirrels following you around at the same time
Rode 4 different creatures within 60 seconds
Played the trumpet to an Elephant
Collected 40 Gold Bricks
Had two tamed pets following at the same time
Collected 30 Gold Bricks
Collected 25 Gold Bricks
Rode a Shark on land
Dived continually for 3+ minutes
Collected 20 Gold Bricks
Completed 15 seconds of consecutive climbing, jumping or back-flipping
Collected 15 Gold Bricks
Bought something from the night Trader
Found an item in a chest
Caught a Troublemaker
Completed the Candy Construction Capers World
Collected 10 Gold Bricks
Completed the Prehistoric Peril World
Bounced on Lava 7 times consecutively
Completed the Pirate Playground World
Collected 3 Gold Bricks
Chased down and rode a Pig
Started your Adventure
Use the terraforming abilities of all capable vehicles
Get 5 seconds of continuous vehicle air time (not including off the edge of the world)
Accumulate 10+ seconds of consecutive zip time with the grapple gun in one grapple session
Splat a seagull with the paint-ball gun while it's mid-flight
Find the Legendary 1x2x3 Slope Brick
Find the Legendary 2x2 Corner Brick
Find the Legendary 3x3 Corner Brick
Collect all the brick elements
Collect a billion studs
Driving the Space Buggy, launch it into the air for 3 seconds
Defeat 8 Large Space Spiders within 40 seconds. Watch out for pincer attacks!
Play some lunar tunes on the moon with another player whilst using a different musical instrument
Take Intergalactic Girl to the Classic Space Biome (Moonwalking optional!)
Shoot 10 rockets from the mobile Rocket Launcher
Create a single custom character, using a part from each of the new monster characters
Stake a claim to Monster Town by playing as the classic Vampire character in the Monsters pack
Play a guitar solo in the Monster Biome stage area in front of the crowd
Use the paintball gun to splatter paint on all the new monster characters
Collect Vampire & Lord Vampyre's Bride, then place them together in the Monsters castle