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