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