Much as I hated to finally admit it to myself, American Conquest is completely unplayable in SP. But SO beautiful! I think it's even much more beautiful than Cossacks 2. Damn GSC for sucking so bad . . . which is why I come to awesome indie games . . .
Please keep working on this. Games so often have basic areas like terrain ignored, but it's such an easy way to VASTLY improve the experience.