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