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