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