Here is the full list of all 54 Baldur's Gate 3 achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Multiclass into every class in one playthrough without asking Withers to change your character.
In the Wyrmway, wait until the dragon is midflight, then knock it out of the sky - KAPOW.
Romance the Emperor.
Use one enemy as an improvised weapon against another.
Defeat twenty opponents while a party character is drunk in a single playthough - down them.
Go on a date with Karlach - now that's playing with fire.
Break Wyll's Pact with Mizora.
Leave Act Two - Baldur's Gate is just over the horizon.
Defeat the Apostle of Myrkul before it consumes any Necromites.
Kill the Surgeon before he performs surgery on you in combat.
Rescue Sazza from the Emerald Grove, Goblin Camp, and Moonrise Towers in one playthrough.
Gift Shadowheart a night orchid - her favourite flower. Always knew she was a softie.
Kill the Adamantine Golem without using the Forge Hammer.
Find and summon the quasit Shovel. Or is her name... Fork? Maybe Basket?
Defeat the Toll Collector without her using gold against you - excellent budgeting.
Rescue all the prisoners from the depths of Moonrise Towers in one playthrough.
Leave Act One - for somewhere altogether darker.
Stablise Gale's Netherse orb.
Steal the Blood of Lathander from underneath Rosymorn Monastery.
Recruit a hireling. You can befriend them or use them as cannon-fodder - we won't judge.
Ally with Voss against the Githyanki God-Queen. Good luck.
Create three unique alchemical solutions in a single playthrough - bottoms up!
Kill a character with an unarmed strike.
Craft an item in the Adamantine Forge.
Play fetch with Scratch - the best boy in the Realms.
Read 100 different books in a single playthrough. Adventuring isn't just daring quests, you know.
Kill the Spider Matriarch before her eggs hatch - why do they have so many legs?
Long Rest using only alcohol - a time-honoured dwarfish tradition.
Break out of prison after being arrested - aren't you daring?
Consume a parasite and unlocked a new power - is it meant to wriggle the whole way down?
Complete ten background goals in a single playthrough - you are one with your character.
Take four full long rests in a single playthrough - adventuring's tiring work.
Kill a creature with falling damage.
Dig up five buried chests in a single playthrough - treasure!
Successfully use Detect Thoughts to pry into someone's thoughts.
Let Astarion bite you - ouch.
Defeat Commander Zhalk in the Nautiloid.
Perform five attacks in one turn. Your enemies won't know what hit them (literally).
Take control of the Nautiloid and escape the hells.
Finish the game (with a heartfelt 'thank you!'' from Larian Studios).
Reign with terror: take control of the Netherbrain and bend the world to your will.
Save the day: kill the Netherbrain and destroy the Absolute tadpoles.
Claim your Throne of Blood: take control of the Netherbrain for Bhaal and break the world.
Make the ultimate sacrifice: become a mindflayer to defeat the Netherbrain.
Pet Scratch and the Owlbear cub at the same time - the greatest joy an adventurer could ask for.
Save every tiefling refugee you can throughout the game in a single playthrough.
Coat the streets of Baldur's Gate in blood - become an Unholy Assassin of Bhaal.
Earn a hundred gold from playing sweet, sweet music in a single playthrough.
Defeat Gortash in Wyrm's Rock without activating any traps.
Kill Orin while her cultists are performing their ritual chant.
Kill the Red Dragon in the Upper City.
Become Bhaal's ultimate weapon - become his Slayer.
Complete the game in Tactician mode.
Complete the game in Honour mode.