The Behemoth's taken the wraps off Game #3, as you can see on Gamespot.
The nutshell: "Basically, the game allows a number of players to take part in competitive scenarios that control like a typical 2D platformer, but with all the eccentricity and charm The Behemoth is known for."
There's a gameplay video after the break. No platforms. It's out in 2010. Thanks, Kotaku.