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