Anticheat System?

[3ffect0R]

Hi!
I think many of you know the Line Tower Defense Maps. I want to create such an Anti-Cheat like they're doing.
I created an invulnerable Taure with a lot of damage. When he cant pass the way he should destroy some towers...
But how do I realize it, that he only attacks Towers, when he can't pass the way throuh?

 

[SerraAvenger]

he allways does if you order him to "move" to the next checkpoint.
Greeetings Serra

 

[Teh_Ephy]

Why not just make it so you can't build in certain areas? Make it so there's a big maze of un-buildable terrain, but don't make him have to follow it.