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