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