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