Download Global Defense Network
The more I play GDF, the more I like it. There's a slight learning curve as you figure out how to fire weapons, but once you get in a comfort zone with the controls, it's a ton of fun. The game challenges you with multiple levels of target shooting, where you aim for various incoming obstacles and eliminate them from the screen to gain points, ranking, and new weapons. The simulation room gets you started, allowing you to earn points and status before taking on complex missions. As you advance in skill and points you gain access to more complex. The sound tracks with the various levels on this game add to the intensity, especially if you play while wearing headphones. The first 60 minutes of play is free.
