The demo of the zombie survival training game (also known as Left 4 Dead 2) is available now to Xbox Live Gold subscribers. Although the retail game completes the scenario snippet on offer, the demo certainly feels like "more of the same," albeit with the addition of some new melee and bullet-required weapons.Also on the shooter front: Battlefield 2: Modern Combat can now be acquired through Games on Demand for $20. Far Cry 2 is also available outside of North America. As always, we feel it prudent to mention that the titles are likely to be found cheaper at a local brick-and-mortar shop (at the risk of running into shopper zombies!).Shortcuts:

Add Left 4 Dead 2 demo to your download queue [via Xbox.com]
Purchase and add Battlefield 2: Modern Combat to your download queue

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