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It seems the Metal Gear game fans have been waiting for has been finally announced at Konami's Metal Gear 25th Anniversary event: Metal Gear Solid: Ground Zeroes

Image courtesy of Famitsu.

The unveiling consisted of a real-time demo, but at this stage all English language reports about what was shown have come through Twitter. Guests were reportedly asked not to post about what they were seeing, but many did so anyway. While some posts were deleted within minutes, the picture that emerged is that Metal Gear Solid: Ground Zeroes is an open-world game and was reportedly demoed on a current-gen PC It's also running on the new FOX Engine and has left those at the event amazed. @kazamatsuri said, "Metal Gear Solid Ground Zeroes demo was truly amazing, running on a PC at current-gen specs. Wow." @markmacd tweeted, "Demo of "Metal Gear Solid Ground Zeroes", started w cutscene (all realtime), went into gameplay, open world, night, raining, base. AMAZING," followed by "Snake crawled @ avoiding searchlights, killed guard, rode jeep, called in heli for evac. Sounds like MG, but the scale & atmosphere... Wow." @ItCameFromJapan chimed in with more details, saying, "Ground Zeroes on Fox Engine - rich detail, open world, and Old Snake is back!"It is not known when Konami will reveal the Ground Zeroes to the rest of the world.Earlier this week, during the latest Kojima Productions podcast , Kojima Productions' Chris Johns claimed announcements made at the Metal Gear 25th Anniversary event would "shake" the industry.