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