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