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