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