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