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