PSA: Valve discounts L4D and L4D2 with release of The Sacrifice DLC

Valve has sent over a lovely mail, reminding us The Sacrifice DLC for Left 4 Dead and Left 4 Dead 2 is out now available, as well as L4D2 on Mac.

The DLC is free of charge to all Steam users who own either L4D game, Mac users too now that L4D2 is available.

To celebrate, Valve has put both zombie shooters and their respective bundles on sale for 66 percent off: $6.79 each, $10.19 for the both, or $20.39 the respective four-packs.

The Xbox 360 versions of The Sacrificeare is now also available via Xbox Live today for 560 MSP.

Here's some more information from the mailing:

• The Sacrifice DLC for L4D1 is a separate download than The Sacrifice for L4D2.
• In The Sacrifice for Left 4 Dead 1 gamers receive the complete Sacrifice campaign with maps playable in Campaign, Versus, and Survival.
• In The Sacrifice for Left 4 Dead 2 owners receive "The Sacrifice" campaign playable with the Left 4 Dead Survivors. In addition, those with Left 4 Dead 2 receive L4D's "No Mercy" campaign. Both campaigns are playable in Campaign, Versus, Survival, and Scavenge modes and both will feature the Left 4 Dead 2 Special Infected, items, and weapons. Yes, Zoey with a chainsaw.

We know what we're doing tonight, then.