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