We here at Big Download obviously love Cave Story. A lot. It is then, with great pleasure, that we found out about a Cave Story hack being offered called Hack9. It's in Japanese, but you can figure out the game itself pretty easily. The only downside is unless you are fluent in Japanese, you'll have no clue about the story. It plays almost exactly like Cave Story but with a significantly darker tone. You are killing soldiers and destroying tanks and helicopters, lending it a much more military flair. All in all, if you're looking for a fun platformer, it's definitely worth a try, even if you can't understand it.