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