If you haven't picked this game up yet, you should definitely get it this weekend:
The content, titled "The Pit," will contain three combat-intensive challenge levels "where gravity is the enemy and taking a wrong step can be fatal." The challenges, said to feature "destructible floors and traps," will be supported with leaderboards and achievements.
To mark the occasion, the game will be reduced from its current price of $20 to a very affordable $10 on Steam.
Very unique and fun game.
I guess they're already hard at work on a sequel too, which is great to hear.