How to Unlock Secret Ending
Progress through Darksiders 3 to eventually encounter the Lord Of The Hollows. This
character will give you one final gift, but only if you visit him very late in the game.
Then, complete the following tasks:
#1 – Go to the Scar and find a gust of wind. Use Hollow power to ride up and follow this new passage to find the demon Abraxas. When you speak with Abraxas, you can choose to betray the Lord Of Hollows or kill Abraxas. Choose to kill Abraxas to initiate an optional boss fight. Collect the Soul Of Abraxas after defeating the boss.
#2 – Return to the Lord Of The Hollows. You can fast travel to the Lord Of The Hollows Chamber from any Serpent Hole. Once you return, you will have the option to “Spare the Lord Of The Hollows” or “Kill the Lord Of The Hollows”. Choose to “Spare the Lord Of The Hollows” to unlock the best ending and get the “A Parting Gift” achievement.