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