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