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