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