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