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