Amazon has a deal going on where you can buy Puzzle Fighter HD Remix or Street Fighter II Hyper Fighting on the Xbox Live Arcade and get a second code to download the game free! This means you can download one of the best puzzle games on Xbox Live and then gift it to a friend as well for free. This is perfect for Puzzle Fighter's online mode, which is all kinds of ridiculous fun with a friend. 

It's for today only, so go get your code to download the games here on Amazon.