The Portal games were revolutionary not only for their puzzle-based, narrative-driven gameplay, but also for their unique physics engine, which let players open portals anywhere and conserve momentum ...

Some portals offer tool bars or plug-ins for your Web browser that remind you to shop through the portal when it notices you visit a retailer directly. However, those reminder tools are a drawback if ...

You can also now add a passcode to lock your Portal away from any small or unwanted hands, and on a larger note, support for ...