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