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