The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Sumo Games:
Earth. Year 2049. Creatures from a distant galaxy are going to take over! The annihilation of the human race is at hand. Who will protect our planet and save mankind? A team of experts from an underground base has assembled the ultimate robotic gadgetry to defeat these extraterrestrial forces. A few courageous citizens have stepped forward to help the cause and become half-human, half-cyborg, known as the Robot Troopers. But this team and armory are insufficient to fully defend planet Earth. Recruitment is ongoing, robot parts are continuously produced. Your mission is to prepare the hi-tech facility for mass-production of the robotic parts and the combat training of new recruits. Prepare for the epic intergalactic battle between humans and aliens! The Robot Troopers are our last hope! The fate of our existence lies in your hands!