MapAttackWith3DAR is a project mainly written in C and OBJECTIVE-C, it's free.
Play Geoloqi's MapAttack in augmented reality. Magnetometer (compass) required on an iOS device.
MapAttack 3DAR app for the iOS.
Learn more about the game at http://mapattack.org/
Developers will need to get a free 3DAR device license to run this app. Request licenses from Spot Metrix at http://spotmetrix.com/contact-us/
MapAttack is a service by Geologi. 3DAR is distributed by Spot Metrix.