Objective: Survive 20 waves
Here’s how to beat the palisades on hard.
I always play with the belief that one fully upgraded tower is better than two or three basic towers. It’s much more powerful, offers greater range and takes up less space.
You only have the option if using cannon towers on this level, so that’s all we’ll use.
Start by upgrading the cannon tower that is already placed at the beginning to the level.
Enemies slow down a little when the turn corners. By placing towers on (or near) corners you’ll be able to maximise their effectiveness. Build one tower at a time and only build another when your tower is fully upgraded.
Build another set of towers mirroring the first set you built. Again, build and upgrade one tower at a time. I built an additional cannon tower last, right near the base as a final insurance policy, should any of the quick moving enemies get through.