Yes, that's what I mean, maybe it's just me, but I thought that with all this bright and colorful world, a dark cave or something like that might not fit in as well.

nice. So whats it like using UDK because its actually an alternative im checking out to substitute for having to put together a framework from scratch. Whats it like importing custom assets?

Once you've learned the basics, using UDK is really simple, it's really easy to import assets, you click on import and create a (or use an existing) package and group to store it in, then it's easy to access, the material editor is both simple and really complicated, making a material is easy, but to make something incrdible is a bit rougher, but still achievable. There's unrealScript wich is like java mixed with C++ if you want to code for custom games (for that, there's the nfringe plugin for visual studio wich is usefull as it knows the commands the engine will accept. And finally, there is Kismet, the visual script utility of UDK, wich is as easy to manipulate as connecting the event node to an action node performing what you want to do. With a bit of tutorials, I'd bet anybody could make a decent looking map and with a little more experience or other people (programmers) a great game is achievable.

made them myself, why?