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