I’ve come across an awesome game called Field Runners in the IPhone. It is very fun, and here is my strategy for the Grasslands Map and the highest level I get to is 115 on ‘Hard':
The same strategy on ‘Easy':
Here are the reasons for the above layout:
1. All heavy weapons are concentrated in the horizontal path. This is the only way to defend from the fast running airplanes.
2. For units other than airplanes, they must go through a long path to get to the exit, and in the path they will be constantly hit by the Teslas.
3. For extremely strong units (ie. the red Robot), they can be easily re-routed by switching positions of the guns.
Here is my Crossroads Map Strategy for ‘Hard’, it gets to level 135:
The idea is to keep all firepower in the center, which is the most efficient allocation of resource to counter air units. For ground units, the routing forces everyone to go through the same route, which is easily reversible by removing the gun unit on the most left column and blocking the exit in the lower right corner.
Recently the new update bring us two new weapons, the flame tower and the mortar tower. Since the mortar tower has massive splash damage, it allows me to beat the helicopters that troubled my strategy. So with mortar tower, I am able to get to level 161 on ‘Hard':