I'm not entirely sure as I haven't read it recently. But generally, it might revolve around the adventures of the keeper in the world of lost cities, perhaps facing new challenges, uncovering secrets, or dealing with some sort of legacy left behind in that magical world.
I'm not positive, but I'd assume the keeper is a main character. There might also be some sort of mentor figure or a sidekick that helps the keeper in their journey related to the lost cities' legacy.
I think Uncharted Story is good. The way it unfolds keeps you hooked, and the settings and action scenes are well-done. But, of course, it's subjective - different people have different standards for what makes a story good.
First, think about their backstory. For example, if they're an adventurer, what led them to this life? Maybe they grew up in a family of treasure hunters. Second, give them unique skills or flaws. A skill could be expert marksmanship, and a flaw could be a fear of heights. This makes them more human. Finally, tie them into the existing Uncharted world. Maybe they have a past with one of the existing characters.
Perhaps an OC is a young archaeology student who idolizes Nathan Drake. They manage to get involved in one of his expeditions through sheer determination. Along the way, they learn from Drake and also teach him new things about modern archaeological research methods. It could be a story of growth and adventure for both characters.
We can conclude that the mobile version of Uncharted 4 is a mobile game that focuses on the action experience of a deserted island. In the game, players could control the protagonist Drake to challenge and adventure, and puzzle solving was a feature of the game. The game provided rich sea areas and deserted islands, high-definition graphics, and the control of classic characters. Although the search results did not provide a specific download link, we can try to download and install the mobile version of Uncharted Seas 4 on the official website of Peapod or through the Peapod app.