Subatomic Studios, LLC has Fieldrunners (iTunes Link) for the iPhone and iPod Touch in the iTunes App Store for 99-cents (2.99 – 2 instant savings) for a limited time.

Experience the award winning tower defense game like never before thanks to full Retina display support! Stop the invading fieldrunners by creating mazes out of powerful weapons in this classic strategy game. Control the battlefield using limitless strategies and a diverse selection of upgradeable towers!