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