So recently I've been getting flashbacks about a game I played a few years ago. All I can remember about it was a 3D platformer or at least had most of the mechanics of one, it had a pretty vast hub level separated into sections and across at least 3 vertical levels. Individual levels were contiguous with the hub level, either that or they had extremely short loading times, and one level was set in a cave similar to the mines from Oblivion. The whole game had an air of 'isolation' about it, with few enemies around.
The catch is all this may very well have just been a dream. I tend to come up with brand new game ideas in my sleep a lot. So, if this was just a dream, can anyone recommend any good 3D platformers with the emphasis on exploration rather than action?