Modern tower defense games for iOS

The tower defense genre started out with Desktop Tower Defense, a Flash game you could play in your Web browser, but once the iTunes App Store opened, developers quickly realized this type of game was a perfect fit for iOS devices. Soon, tower defense games that are now iOS classics emerged, including GeoDefense, Fieldrunners, and the hugely popular Plants vs. Zombies. The touch-screen interface made iOS devices a natural platform for tower defense gaming, allowing you to place units easily with only a few taps of your finger, and the result was the perfect time-waster requiring both quick thinking and a solid strategy.

Those early games are still fun even now, but the modern entries in the Tower Defense genre add even more to the action with 3D graphics, new types of gameplay, and new ways to take advantage of today's more powerful iOS devices. Whether you're a serious tower defense aficionado or new to the genre, you'll like the direction developers have taken with the tower defense games that are now available.

This week's collection of iOS apps are all tower defense games. The first is the latest sequel to a popular franchise in which you take the fight to the alien homeworld for the final showdown. The second offers up crisp 3D graphics as you defend a flock of sheep from an onslaught of enemies. The last is a new game that takes a different angle, challenging you to become the invader against well-defended maps, using units and abilities to keep your assault force alive.… Read more

What LastPass security issue means for RoboForm (Q&A)

After LastPass reported a possible security breach and potential theft of some of its users' master passwords last week, we wondered what it meant for other password managers, such as RoboForm.

Both LastPass and RoboForm help you create and manage strong passwords to log into the increasing array of secure Web sites that we all juggle these days. But is there an inherent vulnerability in relying on a single service to keep track of all your passwords? Should RoboForm users be concerned about the possibility of a similar "anomaly" exposing any of their data?

To answer those questions and learn how RoboForm strives to keep its own customers' data secure, CNET recently spoke with Bill Carey, RoboForm's vice president of marketing.

Q: Bill, from what you may know of what happened at LastPass, what was your take on it? Carey: That's a good question. I don't think anybody really knows what happened yet. I'm not even sure LastPass really knows what happened yet. I've read some of the articles and I read their blog, and they said there was an anomaly. It appears someone had access to their servers for a certain amount of time and that there could've been a transfer of data. But I don't think it would be fair for me to comment on it because I'm not really sure what happened yet. But I appreciate that you're writing it from our standpoint because no one's really thinking about "well, who else is out there and what are they doing and how are they protecting [their data]."… Read more

How to deal with LCD pixel problems in Apple displays

Liquid crystal displays (LCD) use a grid of definable points on a screen to display information. Used in many of Apple's products, including Cinema Displays, MacBooks and MacBook Pros, and the iPhone, iPod Touch, and iPad, LCD screens can be subject to pixel anomalies. As Apple puts it:

Each pixel has three separate subpixels--red, green and blue--that allow an image to render in full color. Each subpixel has a corresponding transistor responsible for turning that subpixel on and off.

If any of these subpixels or transistors fails, it can result in a "dead" pixel on your display. … Read more