Earlier this week we reviewed 0 Day Attack on Earth, a four player co-op twin stick shooter from Square-Enix. Lets just say, we weren't particularly thrilled with the offering that set us back $15.
But if you're a sadist and feel like blowing some more money, you can drop 560 
or $7 on the first expansion pack for the game. Battle it out over London in single player or co-op, but don't bother trying the game's other multiplayer modes in it, it won't work. We'd recommend spending your money elsewhere.
Source: Marketplace.xbox.com