Here is the full list of all 49 Hades achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Fulfill the 'End to Torment' Prophecy
Earn all Chthonic Companions
Reach the epilogue of the story
Earn the second of Skelly's prizes
Fulfill the 'Night and Darkness' Prophecy
Fulfill the 'Musician and Muse' Prophecy
Fulfill the 'Divided by Death' Prophecy
Trade 20 times with the Wretched Broker
Fulfill the 'Slashed Benefits' Prophecy
Max-rank each standard Keepsake
Fulfill the 'Harsh Conditions' Prophecy
Fulfill the 'Dark Reflections' Prophecy
Unlock each standard Keepsake
Earn a Loyalty Card
Unlock all Weapon Aspects
Use an Olympian's Greater Call against them in a Trial
Complete the main quest in the story
Purge a Legendary Boon
Beat Thanatos by 15 kills or more
Fulfill the 'War-God's Bloodlust' Prophecy
Earn the first of Skelly's prizes
Get 20% dodge chance with the Lambent Plume
Get 30% bonus damage with the Pierced Butterfly
Forge a bond with any character
Have at least one rank in each Mirror of Night Talent
Clear Elysium with the 'Extreme Measures' Condition
Catch a fish from each region
Clear an escape attempt with a hidden Weapon Aspect
Buy 9 'Well of Charon' items in one escape attempt
Clear an escape attempt
Use Greater Call to invoke an Olympian's aid
Clear an Infernal Gate without taking damage
Pet Cerberus 10 times
Clear Tartarus
Clear Elysium
Fulfill any 15 Prophecies
Max any Weapon Aspect
Fully Unlock the Olympians' Codex entries
Clear Asphodel
Compel Orpheus to sing again
Unlock each of the Infernal Arms
Equip a Chthonic Companion
Fulfill the 'Master of Arms' Prophecy
Choose 100 different Olympian Boon effects
Earn access to and enter the Administrative Chamber
Pay for 50 jobs from the House Contractor
Slay Skelly 15 times
Fulfill the 'Chthonic Colleagues' Prophecy
Choose 50 different Daedalus Hammer enchantments