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