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