Using Maria in stage two, fall down the first pit when the behemoth is chasing you and beat the rest of the level. You will then be taken to a secret stage three. Eventually, you will come to a point that has two paths. Take the upper path and continue along. You will soon come to a point that has platforms on the top and bottom. Break the vine at the top and continue to jump on the top platforms. Break the tombstone at the end and you can play the original version of Rondo of Blood!