The Good: Fieldrunners 2 has 20 towers to choose from. Different game modes make this more than your typical tower defense game. The Bad: There's no way to see firing ranges of multiple towers at once. A training or practice mode would be nice. The Bottom Line: New maps and weapons make Fieldrunners 2 even better than the original. Fieldrunners 2, the sequel to one of the earliest and more popular open-field tower defense games, has finally come to Android, and it is even better than the original.Set in a modern era with high-tech yet comical warfare, Fieldrunners 2 pits you against wave after wave of soldiers, jeeps, and other military units. To fend off these waves, you need to use turrets to create a maze of destruction. Just as in the original Fieldrunners, setting up your turrets in a mazelike formation is extremely important because you want to keep the enemies within firing range for as long as possible. With that in mind, you'll want to force your enemies to double back and walk in S-shaped paths if you want to inflict maximum damage.Additionally, the sequel has added some fixed-path gameplay with trenches you'll need to build around. The strategy for these sorts of levels is completely different, which adds even more fun to the already rich game. Since you are no longer the one determining the path, the best thing to do in these levels is make sure you diversify and spread your units effectively.