While the online game doesn’t claim any ties to liberal groups, it’s a sure bet that Jim DeMint wasn’t behind this. From MRCTV.org:

Video Game Allows Players to Slaughter “Tea Party Zombies” Like Sarah Palin and Bill O’Reilly.

You’ll see references in the game such as: “Pissed off stupid white trash redneck birther zombie.”

I’m guessing the creators of the game aren’t part of the vast right-wing conspiracy. Therefore, this must all be part of the new civility liberals have promised us.