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