Blade Guardian adds a touch of motion control to the genre. If you want to strike back against the alien horde, tap on transporters to attack them. This makes transporters release BLADEs and if use gold and HP you can upgrade these units to Sphere Blades. Sphere Blades roll around the screen when you tilt your iPhone and attack alien nests they come in contact with.
Blade Guardian is slated for release on October 1 for iOS devices.