Battle Isle can be regarded as one of the grandfathers of turn-based strategy. I still remember how I played the first one with my cousin splitscreen for hours. But, in my opinion, the real gem here is Incubation, one of my absolute favorite games out there. It's a classic, an excellent blend between turn-based strategy and RPG (you can assign experience points to your soldiers and level them up in different fields). A must buy for every fan of turn-based strategy!