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