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