"X (tentative title) is a Japanese role-playing video game by developer Monolith Soft. The game is part of the company's Xeno series of video games, the most recent being Xenoblade. It is scheduled for release in 2014 in Japan, North America, and Europe.
The game plays as an open world role-playing video game, with an emphasis on exploration. Traveling can take place on foot, or in large humanoid robots, mechs, approximately four times the size of the average playable character, called "DOLLS", that the player may opt to control. The DOLLS have the ability to fly, traverse water, and transform into tanks. Aerial battles will also take place in the game. The player may traverse the world through use of a motorcycle as well."
Source: Wikipedia, "X (video game)", available under the CC-BY-SA License.