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