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