An unfinished developer build of Gears of War 3 has been leaked online, according to NeoGAF and supported by YouTube footage, including the above video showing a "Beta" Gears of War 3 loading screen and campaign footage.

The leak is a JTAG version of Gears 3, meaning it will only play on specially modded or dev-kit Xbox 360s. These are commonly difficult to come by, but just because you can't run the leaked code (you can't, right?) doesn't mean other, far less scrupulous people aren't capable. YouTube and video-streaming sites will most likely contain early videos of the game, so shoot your computer screen now if you don't want to see 'em.

We've reached out to Epic Games for comment on if, and how, this will affect Gears of War 3's development and release.