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