The Australian Classification Board database has rated an unannounced Uncharted game for multiplatform release.
The game is being developed by One Loop Games, whose specialties include PSN, XBLA, online social networks and mobile titles, not by Naughty Dog.
One Loop's website lists two secret projects, one of wich is said to be their "first big game"
Uncharted: Fight for Fortune rated in Australia - Gematsu
Uncharted: Fight for Fortune accidentally revealed « Player Attack
One Loop Games : Projects