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.
Save the day: kill the Netherbrain and destroy the Absolute tadpoles.
Make the ultimate sacrifice: become a mindflayer to defeat the Netherbrain.
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.
Kill the Red Dragon in the Upper City.
Kill Orin while her cultists are performing their ritual chant.
Romance the Emperor.
Defeat twenty opponents while a party character is drunk in a single playthough - down them.
Break Wyll's Pact with Mizora.
Leave Act Two - Baldur's Gate is just over the horizon.
Pet Scratch and the Owlbear cub at the same time - the greatest joy an adventurer could ask for.
Defeat the Apostle of Myrkul before it consumes any Necromites.
Rescue all the prisoners from the depths of Moonrise Towers in one playthrough.
Defeat the Toll Collector without her using gold against you - excellent budgeting.
Ally with Voss against the Githyanki God-Queen. Good luck.
Steal the Blood of Lathander from underneath Rosymorn Monastery.
Read 100 different books in a single playthrough. Adventuring isn't just daring quests, you know.
Stablise Gale's Netherse orb.
Kill the Surgeon before he performs surgery on you in combat.
Gift Shadowheart a night orchid - her favourite flower. Always knew she was a softie.
Kill a character with an unarmed strike.
Leave Act One - for somewhere altogether darker.
Kill the Adamantine Golem without using the Forge Hammer.
Craft an item in the Adamantine Forge.
Use one enemy as an improvised weapon against another.
Play fetch with Scratch - the best boy in the Realms.
Long Rest using only alcohol - a time-honoured dwarfish tradition.
Consume a parasite and unlocked a new power - is it meant to wriggle the whole way down?
Recruit a hireling. You can befriend them or use them as cannon-fodder - we won't judge.
Defeat Commander Zhalk in the Nautiloid.
Complete ten background goals in a single playthrough - you are one with your character.
Kill the Spider Matriarch before her eggs hatch - why do they have so many legs?
Take four full long rests in a single playthrough - adventuring's tiring work.
Dig up five buried chests in a single playthrough - treasure!
Successfully use Detect Thoughts to pry into someone's thoughts.
Perform five attacks in one turn. Your enemies won't know what hit them (literally).
Kill a creature with falling damage.
Take control of the Nautiloid and escape the hells.
Claim your Throne of Blood: take control of the Netherbrain for Bhaal and break the world.
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.
Create three unique alchemical solutions in a single playthrough - bottoms up!
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.
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.
In the Wyrmway, wait until the dragon is midflight, then knock it out of the sky - KAPOW.
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.