Mushroom Kingdom Fusion is a fan game with modified Mario gameplay, crossed over with many different video game universes and elements.
This is just a tiny sampling of the amount of crossover levels in this fan game. This is a rendition of the first Halo's most famous level: The Library. MKF's version is very long, and it is auto-scrolling to simulate you having to follow 343 Guilty Spark through The Library. This video also previews the unique crossover powerup: the Spartan Suit. It gives a character the guise of a Halo character, depending on the character being used.
Dagnabit! This is so unique and impressive. You had me at the idea stage, but now that I've seen a video, it's much more impressive. You've got my curiosity spiked enough that I know I'd pay money for it.
God this looks bloody awesome..
... and I bet yer one of those 8 bit geeky nerd nintendo kids playing this huh?
You're the absolute master right there.
Oh, man, that was entirely unexpected and cool.
Although the lightsaber sounds for the sword were kind of bad.
Heheh, when he started humming it was great.
Now That was epic