You're up against "Jacque de la Morte" - you have to release the captured women.
You're a female French woman in a jester outfit. Neato!
Get the shotgun. You'll meet up with zombie people as you listen to serene monk music, tolling bells (for whom do they toll?) and run around in a rat-maze of brick sewers with metal grates. Just where is that cheese?
You have a weak shotgun.
On the left you find a lever - it lifts up the sewer gates. Go into the sewer mouth. There's body armor up stairs.
You have to find 3 maidens on easy, four on medium. Then go to roof, get crystal, get Jacque. OK, time to begin.
Head up into crypt. Right there is woman 1, who says "merci" :)
There's body armor on the right in a cell - shoot off the lock. Woman 2 is just ahead on easy, and in the right cell on medium.
After you free her, head right. On medium a third girl is here - it's really a monster. Free her and then beware. The real third girl is over to the left. When you're set with this pair, then left up the stairs.
Checkpoint, time crystal located. You're now in the cathedral. The time crystal is on the altar. The girl is hanging from a rope. Do NOT shoot her down!! Go up stairs at front of church - pull rope - frees the final girl. Go down and defend until she and the hunchback escape. You get bonus points for the hunchback.
Now, facing the altar go right. Go up to balcony. A portal monster appears - huge - must kill it. Then go forward and up to door. Now you're up on the roof. Kill the enemies that appear and then kill Jacque. Portal will appear. Winning this on medium unlocks Jacque de la Morte.