No, its not an open beta, but for the last week of the beta they are letting people invite one other person and up to five people if they meet certain requirements.
You've been tearing up the Gears of War® 3 beta for a couple days now, and it's almost time to let you choose which of your friends you want to bring into the fun.
That's right, we're going to let you bring up to five of your friends into the fight in the last week of the beta. Together, you'll get the chance to preview the game before most people and help make Gears of War 3 even better.
We're giving you one extra code just for being in the beta.*
Want to bring even more people in? You'll get one more code for doing each of the following things. You can do any or all of them and get one extra code for each.*
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Purchasing any Gears of War content from Xbox LIVE® Marketplace—that includes game add-ons, games from Games on Demand, and Avatar gear.
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Spending 20 or more hours playing the beta from today on, helping us make Gears of War 3 a better experience.
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Adding 12 months of Xbox LIVE Gold to your membership—if you already have several months or more remaining, the time will be added on to the end of your subscription.
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Having at least 100 hours of gameplay logged on the Gears of War franchise. That includes single player and multiplayer across Gears of War, Gears of War 2, and their add-ons.