Here is the full list of all 49 Hades achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Clear an Infernal Gate without taking damage
Earn all Chthonic Companions
Fulfill the 'Divided by Death' Prophecy
Earn a Loyalty Card
Clear an escape attempt with a hidden Weapon Aspect
Fulfill the 'End to Torment' Prophecy
Unlock all Weapon Aspects
Earn the first of Skelly's prizes
Clear Elysium with the 'Extreme Measures' Condition
Reach the epilogue of the story
Fulfill the 'Harsh Conditions' Prophecy
Fulfill the 'Master of Arms' Prophecy
Fulfill the 'Night and Darkness' Prophecy
Fulfill the 'Musician and Muse' Prophecy
Max-rank each standard Keepsake
Fulfill the 'Slashed Benefits' Prophecy
Unlock each standard Keepsake
Complete the main quest in the story
Max any Weapon Aspect
Fulfill the 'Dark Reflections' Prophecy
Get 20% dodge chance with the Lambent Plume
Use an Olympian's Greater Call against them in a Trial
Catch a fish from each region
Equip a Chthonic Companion
Fully Unlock the Olympians' Codex entries
Purge a Legendary Boon
Have at least one rank in each Mirror of Night Talent
Trade 20 times with the Wretched Broker
Clear an escape attempt
Fulfill any 15 Prophecies
Forge a bond with any character
Choose 100 different Olympian Boon effects
Fulfill the 'War-God's Bloodlust' Prophecy
Choose 50 different Daedalus Hammer enchantments
Earn access to and enter the Administrative Chamber
Compel Orpheus to sing again
Clear Elysium
Pay for 50 jobs from the House Contractor
Fulfill the 'Chthonic Colleagues' Prophecy
Beat Thanatos by 15 kills or more
Buy 9 'Well of Charon' items in one escape attempt
Clear Asphodel
Use Greater Call to invoke an Olympian's aid
Unlock each of the Infernal Arms
Clear Tartarus
Slay Skelly 15 times
Pet Cerberus 10 times
Earn the second of Skelly's prizes
Get 30% bonus damage with the Pierced Butterfly