Valve is releasing an expansion pack called Crash Course.  The DLC will include Survival and Versus mode.  But biggest change will come to the game’s campaign.  Crash Course will “bridges the gap between the end of the ‘No Mercy’ campaign and the beginning of ‘Death Toll’ in the original game, expanding the game universe with new locations, new dialogue from the original cast, and an explosive finale.”

However if you own a 360 this expansion is going to cost you 560 Microsoft points ($7).  And if you play the game on the PC it’s free via Steam.  Now why is this the case?  Why is it free on one platform and not the other?  In a statement, Chet Faliszek said it’s not Valve's decision:

“We own our platform, Steam. Microsoft owns their platform. They wanted to make sure there’s an economy of value there. It’s not like we’re [Valve is] looking at this as, ‘Oh my god, we need some money, we’re going to charge,’ obviously, or we’d do it on the PC. So it’s just kind of the way the system works right now.”

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