An unfinished but near full-featured version of Gears of War 3 has leaked onto the Internet over the weekend. According to a poster on the website NeoGAF, the leaked build of Gears of War 3 includes the full single-player campaign and all the multiplayer options. "Buggy as hell, but it seems like it's all there," the post claims.

The game isn't due out until September 20 and is considered perhaps the biggest exclusive for the Xbox 360 this year. Naturally, Epic is working hard to try and contain the leak, or at least punish those that are responsible for it, claiming it is working closely with their security teams and law enforcement to address the situation. The company was also quick to assure that the leak does not represent the experience players will have with the real thing.

Although unfortunate, this shouldn't hurt Epic Games too badly considering the leaked build is not a final version of the game and the fact it can only be played on hacked Xbox 360s. However, gameplay videos have already made their way onto YouTube and other streaming video sites, opening the floodgates for Gears of War 3 information and spoilers.

Gears of War 3 is just the latest big name game this year that has been leaked after Crysis 2, Bulletstorm, Killzone 3 and most recently Duke Nukem Forever suffered the same fate. If you are looking forward to Epic Games' shooter and don't want your experience ruined the solution is simple, though: avoid watching any footage from the leaked game.

Instead, you can watch the official Gears of War 3's campaign trailer below.