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