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