The Blood of Dawnwalker has quite a few endings, mostly tied to who you side with. Whether that be Crake, your family, or no one at all. However, there is one ending that you can actually get very easily, and very early in the game.
This is an ending that is accessed by taking the Coward's Path. Both a description of your decision and the actual name of the area of the map you'll need to visit.
Here's a breakdown of how to find this, and how to get the achievement tied to this ending.
Where To Go For The Coward's Ending

The Coward's Path Location
If you look on the left-hand side of the map, you'll eventually scroll down until you see a little road leading out of the map towards a set of gates, with a broken bridge just before the end of this road. If you're still in doubt, the closest shrine is literally called the Coward's Path Shrine.
You should head here, but don't take the lower road through the valley. This is a great area to explore, but only if you are prepared for a fight, as this plays host to a tough boss fight, and is also where you'll find Skender's treasure, the Durandel Sword.

Bridge leading to gate. Use Shadowstep to get across
Take the high road, and use the shrine to change the time to night, as this is the only way you'll realistically be able to reach where you need to go. Then, when you reach the broken bridge, you'll want to use your shadow step ability to clear the gap.
After this, simply walk towards the gates, and you'll enter a little cutscene where Coen contemplates leaving everything behind. His family, Anca, Vale Sangora, and all this drama with Brencis.

The moment of no return. Choose to abandon Vale Sangora forever
You can decline if you like, but to get the associated ending, you'll need to walk out those gates and never look back.
The Coward's Ending Explained

The 'A Hero They Deserve' Ending
This rolls credits for the game, granting you the 'A Hero They Deserve' and 'The Blood of Dawnwalker' achievements.
Plus, you'll be granted a rather enigmatic cutscene that jumps to the present day. Where Coen is living in a high-rise apartment and is waiting on a delivery to his home.
The delivery happens to be a bloodbag, and this rather weathered-looking Coen devours it. All before the corrupted roots you may have seen throughout the game come through the windows, and a silhouette appears in the opening. Setting up for a fight between Coen and this individual.
What do we make of it? Who knows? The setup of a potential sequel. The makings of a Vampire: The Masquerade crossover. That is for you to decide. But we hope this guide helps you find this ending and see it for yourself.