There simply isn't a non-complicated way of doing this. It's been asked before. You would have to incorporate many different, diverse, advanced and complicated scripts. I tried it a while back, just to see how it was done and couldn't figure it out. Sorry.
You could make a game like Super Mario 64 with 8. Even 7!
Game Maker is definitely capable of pulling off something even bigger given the programming knowledge. There are other free 3D-optimized game development utilities, however Game Maker is generally the most user-friendly.