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