Ultraman, Kamen Rider and Gundam come together in 'Not Leaving Japan: The Game'...

Last bit of news left-over from today's Japanese 3DS conference - this concerning a game you probably won't be able to play. From Namco Bandai and Banpresto (developer of the Super Robot Wars titles) comes Lost Heroes.

Lost Heroes is a three-way cross-over between the Ultraman, Kamen Rider and Gundam universes. The game itself is a first-person dungeon crawler, similar to the likes of Etrian Odyssey. Here's the debut trailer.

Lost Heroes is due out in Japan sometime next year.