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