Hideo Kojima has marked Metal Gear’s 25th anniversary with a customary bang, announcing a brand new entry in the series named Metal Gear Solid: Ground Zeroes. Attendees at an overnight birthday bash were wowed by a real-time gameplay demo which showed protagonist Big Boss infiltrating a rain-drenched compound, before offing a guard, driving a jeep and summoning a helicopter in a seamless sandbox environment.

The demo was supposedly running on Kojima Production’s new Fox Engine, and is targeting current hardware specifications. However, Hideo Kojima did tease that the studio was also working on next-generation titles.

Konami’s yet to release the gameplay demo into the wild, but we suspect it won’t be long before everyone gets to feast their eyes on it. And, if the Twitter reactions are anything to go by, it’s going to absolutely blow your mind.

[via andriasang.com, andriasang.com, eurogamer.net, joystiq.com]