Fieldrunner is possibly the most popular tower game available for phones. I think it’s played mostly on iPhones and iPod Touches. I’ve been playing it on my iPod Touch for the last few months. Once i beat the main 3 levels, I bought the other two levels. I was absolutely frustrated with the Frostbite level because for some reason those helicopters simply wouldn’t stop running over my towers. I finally beat the level and was able to push it to level 135.
The secret to this map is to use the ice towers heavily. You should use them between every 5 – 6 towers and upgrade them fully. Although rockets are great for helicopters, in this case, the lightning towers are your friends. I basically wrapped the center of the map in electric towers and ice towers. You can use the gun towers to build the longest possible route to the entrance. I’ve also had a lot of success with making sure that the only entrance to the goals was on the left. The screenshot below is my configuration and what level 100 looked like:
I did try to do some upgrades to see how far I could keep this going but I lost at level 135. The screenshot below is a screenshot of my configuration for the final levels. I should have taken a screenshot at 135, but here’s the one I did at 131. I still had the same configuration at 135. I did try to use the fire towers, but frankly speaking – I don’t think they are effective on this map.