The Sixaxis survived longest in Europe, where the Metal Gear Solid 4: Guns of the Patriots PlayStation 3 bundle, released in summer of 2008, included a Sixaxis. In 2011, Sony announced that their new handheld, the PlayStation Vita, would have Sixaxis motion-sensing capabilities. Features and design A major feature of the Sixaxis controller, and from where its name is derived, is the ability to sense both rotational orientation and translational acceleration along all three-dimensional axes, providing six degrees of freedom. This became a matter of controversy, as the circumstances of the announcement, made less than eight months after Nintendo revealed motion-sensing capabilities in its new game console controller (see Wii Remote), led to speculation that the addition of motion-sensing was a late-stage decision by Sony to follow Nintendo's move. Further fueling the speculation was the fact that Warhawk was the only game shown at E3 that year which demonstrated the motion-sensing feature. Also, some comments from Incognito Entertainment, the developer behind Warhawk, said that it received development controllers with the motion-sensing feature only 10 days or so before E3. Developer Brian Upton from Santa Monica Studio later clarified that Incognito had been secretly working on the motion-sensing technology "for a while", but was also withheld a working controller until "the last few weeks before E3". The Sixaxis features finer analog sensitivity than the DualShock 2, increased to 10-bit precision from the 8-bit precision of the DualShock 2. The controller also uses both analog and digital signals simultaneously at all times during gameplay. The frame beneath the L2 and R2 buttons has been omitted and these buttons have been made trigger-like, with the range of travel determining the degree of analog input rather than the range of pressure. In the place of the "Analog" mode button of previous Sony dual analog controllers (Dual Analog, DualShock and DualShock 2) is a jewel-like "PS button" with the PlayStation logo, which can be used to access the home menu or XMB (after system software version 2.40), switch controller inputs and turn the console or the controller on or off. It fulfills a similar function to the "Guide" button featured on Microsoft's Xbox 360 controller, or the "Home" button on the Wii Remote. Lack of vibration capability Sony announced that because of the included motion sensors, the vibration feature of previous PlayStation controllers was removed, stating that the vibration would interfere with motion-sensing. This therefore