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