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