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.
Complete the game in Honour mode.
Kill Orin while her cultists are performing their ritual chant.
Romance the Emperor.
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.
Rescue all the prisoners from the depths of Moonrise Towers in one playthrough.
Rescue Sazza from the Emerald Grove, Goblin Camp, and Moonrise Towers in one playthrough.
Kill the Surgeon before he performs surgery on you in combat.
Defeat the Toll Collector without her using gold against you - excellent budgeting.
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.
Let Astarion bite you - ouch.
Defeat twenty opponents while a party character is drunk in a single playthough - down them.
Save every tiefling refugee you can throughout the game in a single playthrough.
Find and summon the quasit Shovel. Or is her name... Fork? Maybe Basket?
Kill the Spider Matriarch before her eggs hatch - why do they have so many legs?
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.
Multiclass into every class in one playthrough without asking Withers to change your character.
Earn a hundred gold from playing sweet, sweet music in a single playthrough.
Stablise Gale's Netherse orb.
Become Bhaal's ultimate weapon - become his Slayer.
Finish the game (with a heartfelt 'thank you!'' from Larian Studios).
Make the ultimate sacrifice: become a mindflayer to defeat the Netherbrain.
Complete the game in Tactician mode.
Save the day: kill the Netherbrain and destroy the Absolute tadpoles.
Kill the Red Dragon in the Upper City.
Coat the streets of Baldur's Gate in blood - become an Unholy Assassin of Bhaal.
Break Wyll's Pact with Mizora.
Use one enemy as an improvised weapon against another.
Break out of prison after being arrested - aren't you daring?
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.
Create three unique alchemical solutions in a single playthrough - bottoms up!
Consume a parasite and unlocked a new power - is it meant to wriggle the whole way down?
Defeat the Apostle of Myrkul before it consumes any Necromites.
Long Rest using only alcohol - a time-honoured dwarfish tradition.
Gift Shadowheart a night orchid - her favourite flower. Always knew she was a softie.
Leave Act One - for somewhere altogether darker.
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.
Complete ten background goals in a single playthrough - you are one with your character.
Play fetch with Scratch - the best boy in the Realms.
Dig up five buried chests in a single playthrough - treasure!
Successfully use Detect Thoughts to pry into someone's thoughts.
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).
Kill a character with an unarmed strike.
Take control of the Nautiloid and escape the hells.
Defeat Commander Zhalk in the Nautiloid.