Over the
course of 2008 and 2009, the Bend team chipped away at the then - officially - untitled Uncharted project — which at different points they called Uncharted: Project
X and Uncharted: Dark Secrets, the latter
of which may have been a better fit for Nintendo given its initials — building a new engine, consulting with Sony, and setting up the mechanics that would make it feel at home in the
series.