Here is the full list of all 109 The Age of Decadence achievements.
Ascend
Kill 200 people in the course of one game.
Some Men Just Want to Watch the World Burn
You have a dangerous habit of betraying your masters.
Bring God's Kingdom to Earth
You know what you have to do
Acquire powerful artefacts and learn how to use them.
Complete the Praetor of House Aurelian's questline in Ganezzar
Complete the Praetor of House Aurelian's questline in Maadoran.
Make a deal with Legatus Carbo, promising him a worthy enemy and a war he’s always dreamt of.
Convince Belgutai to join Khan Thorgul and unite the Ordu tribe.
Recover Darius’ helmet but keep such a valuable relic for yourself.
Complete the Praetor of House Crassus' questline in Ganezzar
Complete the Praetor of House Daratan's questline in Ganezzar
Destroy Al-Akia
Complete the Praetor of House Daratan's questline in Maadoran.
Complete the Praetor's questline in Teron.
Have a heart to heart conversation with loremaster Sohrab and make him tell you everything he knows.
Complete the Assassins' Guild's questline in Ganezzar, staying true to the guild
Complete the Assassins Guild's questline in Ganezzar, siding with Varro
Help Lord Darganus keep the rabble at bay
Kill the Guildmaster of the Assassins Guild and Lord Gaelius during an audience at his own palace.
Complete the Assassins Guild's questline in Maadoran (double-cross your Guildmaster and kill Lord Gaelius).
Complete the Assassins Guild's questline in Maadoran (serve Lord Gaelius and kill his enemies).
Talk the raiders into attacking the Aurelian outpost for you to kill two birds with one stone.
Pledge your fealty to House Aurelian, swearing to serve Lord Gaelius and observe your homage to him completely against all persons in good faith and without deceit.
Complete the Assassins Guild's questline in Teron.
Receive training from five different people in the course of one game.
Complete the Imperial Guards' questline in Ganezzar, siding with House Aurelian
Complete the Imperial Guards' questline in Ganezzar with the help of Commander Carrinas
Complete the Imperial Guards' questline in Ganezzar, siding with House Crassus
Kill a hundred people in the course of one game.
Help Hector achieve his goals
Get promoted to the rank of Legatus.
Die a hundred times and live again.
Complete the Imperial Guards' questline in Maadoran.
Fight the Ordu army at a narrow mountain pass and live to tell the tale.
Kill Belgutai to impress the Ordu with your martial prowess.
Visit an Ordu camp beyond the mountains.
Hey, did you see that?
Fix the machines in the buried tower.
Do the right thing. You'll know what it is.
Acquire a rare extract of Amaranthus, use to make an elixir and drink it.
Visit a monastery up in the mountains
Fight your way to the top and become the new Champion of the Arena.
Broker an alliance between House Daratan and convince Commander Carrinas to proclaim Antidas an Emperor.
Get promoted to the rank of Centurion.
Broker an alliance between House Daratan and the Imperial Guards.
Complete the Imperial Guards' questline in Teron.
Provoke Lord Antidas to attack the Imperial Guards delegation and kill him without hesitation, committing regicide.
Join the Imperial Guards to be All You Can Be.
Acquire ten different artefacts to start a collection.
Fast-talk your way out of Teron, getting past every obstacle standing between you and the open road.
Use an improvised explosive device to ambush the shipment and steal the gold.
Convince Centurion Flavius to introduce you to Lord Antidas.
“And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy My brothers. And you will know I am the Lord when I lay My vengeance upon you."
Complete the Thieves Guild's questline in Ganezzar, siding with Glabrio
Complete the Thieves Guild's questline in Ganezzar, double-crossing Glabrio
Kill Faelan the Thrice Blessed
Acquire Power Armor and fully charge it
Enter a wizard's tower and slay the demon that dwells within it, cleansing the tower from evil.
Take a ride in an ancient healing machine.
Explore the Tower of Zamedi.
Complete the Thieves Guild's questline in Maadoran.
Discover and read the ancient tablets - the warning of the Magi
Make new friends and learn how to influence people
Acquire five different relics of the past, without having any idea what most of them are for.
Visit Inferiae.
Visit an ancient arch - a site of many miracles
Visit the Library of Saross
Improve your eyesight with a fashionable mechanical eye.
Put a 'god' out of its misery, releasing it from the horror of its existence and ending the magic that haunted the Abyss for centuries.
Explore the very heart of the Abyss.
Charge into the breach during the siege of Ganezzar
Complete the Merchants Guild's questline in Ganezzar, embracing Meru's Creed
Find a way into Maadoran's sewers
Infiltrate House Daratan’s compound and discuss employment opportunities with Lord Antidas, without having to jump through Dellar’s hoops first.
Make a generous contribution to Regulus' campaign, funding a new militia to keep the city 'safe'.
Complete the Thieves Guild's questline in Teron.
Fight your way out of Teron, leaving nothing but corpses behind.
Complete the first quest as a praetor.
Complete the first quest as a loremaster.
Complete the first quest as a thief.
Complete the first quest as an assassin.
Complete the first quest as a merchant.
Complete the first quest as a mercenary.
You completed the first quest as a grifter.
Solve both the raiders and the Aurelian outpost problems by killing everyone. Not very subtle, but extremely effective.
Pledge your fealty to House Daratan, swearing to serve Lord Antidas and observe your homage to him completely against all persons in good faith and without deceit.
Take the flying fortress for a spin
Let sleeping dogs lie
Bring a new world order
Kill Agathoth to protect mankind
Learn how to use the ancient consoles
Visit Hellgate and live to tell the tale
Complete the Merchants Guild's questline in Ganezzar as per Strabos' orders
Visit Harran's Pass.
Visit Dead River settlement
Discover a long forgotten underground hangar
Visit the ruins of Al-Akia
Visit Ganezzar
Complete the Merchants Guild's questline in Maadoran.
Outmaneuver your opponents and make Strabos the new magistratus of Maadoran.
Visit Maadoran - the largest city in the known world.
Convince a preacher from Ganezzar that you're the Chosen One, sent by the gods to lead mankind out of darkness.
Complete the Merchants Guild's questline in Teron.
Convince Lord Antidas to have Commander Carrinas killed without producing any proof.
Died in the first fight.
Complete the first quest as a drifter.