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