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