My friend and I were discussing about a game we could make when the engine is capable of being coded with Lua, because we both know Lua pretty well. And I thought about an apocalyptic MMORPG in which players can go all over the Earth to play. There'd be airports, towns, cities, and houses along the road. People could live in houses and build it up, go out to a mine to get some material, cut down some wood, build solar panels, windmills, etc.. Players could either look for fights in major towns/cities or go out far into the wild and find a house to live in. The player when spawn with a menu to select an airport to spawn at. From there, it'd obviously be safe inside, they could leave to get a car nearby and drive away, or maybe get an airplane from the runway and find a home somewhere safe, or even find someone else's home. -- Something along the lines of that. But if the engine is a full world engine, why not put use to it?
(All of this should be capable, though. Right? I'd realize it'd take a team of people to do a lot of it. XD)