Fruit Ninja is a classic mobile physics game, but until recently, hasn't been available on BlackBerry. Luckily with OS 10.2.1, we can now load up the Android version from Amazon, and it's easy-peasy.
Step 1: Install and log into the Amazon Appstore
Go to the Amazon Appstore download page in your BlackBerry browser (http://www.amazon.com/getappstore). Tap the "Download the Amazon Appstore" button. The Downloads window should pop up asking you where you want to save it and what the filename should be; just tap Save in the top-right, then tap the file when it's done downloading. If the download window isn't there, tap the overflow menu button in the bottom-right (three little dots), and tap Downloads.
After installation, open the Amazon Appstore, enter your Amazon e-mail and password, and tap the "Sign in with my Amazon account" button. If you don't have an Amazon account, tap the "Create account" button and follow the steps.
Step 2: Download and install Fruit Ninja
Tap the magnifying glass in the top-right of the Amazon Appstore, and type Fruit Ninja into the search box. It should pop up in the results below; just tap the $1.99 (or Free) button to initiate the purchase. You can also buy Fruit Ninja from the comfort of your desktop web browser. You'll have to tap another Install button after that, and confirm app permissions to complete installation.
Step 3: Open Fruit Ninja
Tap the Fruit Ninja icon in your home screens to open it. Slice your favorite game mode and start racking up the points!
I've had good performance with no glitches to speak of, though your mileage may vary. The only issue I've really experienced is a slight audio lag, and a bit of a stutter when booting up and navigating the front menu. I had to make sure to hide the bottom bar and restart the game to get everything properly formatted on screen. Any black belts out there happy to see Fruit Ninja on BlackBerry?