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