Hideo Kojima has revealed a bit more details regarding Metal Gear Solid: Ground Zeroes at a PAX session today.
The recently revealed Metal Gear Solid: Ground Zeroes is a prologue to Metal Gear Solid 5 said Kojima.
Players can call a helicopter to help them navigate the open world setting of Ground Zeroes or to help during missions. The music played on board the heli can be customised and the louder the music, the higher the chance of being discovered by the enemy.
Running on the Fox Engine, it will be a current gen title (PS3 and Xbox 360) but the engine will be scalable to be used with next generation consoles when the time comes.