In a press release issued this morning, Microsoft has confirmed that Valve’s upcoming DLC for Left 4 Dead, the Left 4 Dead Survival Pack, will be released on April 21. The developer has previously announced that the release will be simultaneous across platforms, so this is equally good news for PC gamers.

This will also coincide with the release of the Critic’s Choice collectors edition of the game.

Best news of all? It’s free.

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