I'm fine with buying things as individual components as long as you get a discount if you buy everything - as I want it all. Modern graphics, terrain, ocean/lake/river, networking, advanced physics, GUI, sky, weather, roads... The question is: how much should that cost. If you're only interested in PC development, the engine costs $199. Would it be fair to consider all these the second half of the engine and charge another $199 for them?