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