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