***SECRET***
On the other side, head all the way down the corridor. You'll encounter what I think is a hellhound. Stake it, and you'll find a sword at the end of the hall.
Now head down the ladder or jump down the hole. You can head to the left if you need stakes. Go right through the sewer area and into some big room. I haven't tried it, but don't jump into the green stuff. Go to the other side and into another sewer area. If you try to climb up the ladder, Buffy will be stopped by the steam. Go the right andbreak all the crates for 2 stakes, a hellfire and a valve handle.
Head back to the big room and to the left you'll see a flashing green light. There you can put the valve handle where it belongs and turn off the steam. Now go back and head up the ladder. Fight off a couple of zombies.
***SECRET***
Go left to the little area with the two crates. A hellhound with bust through the door. Kill it and go into that little room for a medi-pak and a battle axe.
Break the crates for a medi-pak, a stake, and a holy water. Go back to the main room and on the left wall you'll notice a fuse box with no fuse and a generator switch that needs the fuse to work. Go through the gated area in the back and a monster will partially bust through the wall; you have to break down the rest.
Kill those hellhounds, and head right for a hellfire and a stake. Go back to the left, and be careful not to run of the grate floor. Walk left around the circle and you'll see a fuse box. Take a fuse and go back to the busted fuse box and place it there. Thenflip the generator switch. Head back to the circle area and go right this time. There's a bridge switch. Switch it then go across the bridge.
Nothing to pick up here. Head through the sewers and up the ladder. You'll find yourself back in a crypt. Kill the zombies and pick up the items if you need them, then head out the door.
More zombies and more vamps to slay. You'll see a bulldozer but you don't have key to start it. Darn. Go to the crypt across from it and inspect the bird statue on the right side. A secret door will open up. Inside, kill the zombie and bust the vases to find the ignition key. Go back to the bulldozer and use the key. It'll bust down the wall.
Get through this crypt and out the door. More zombies and more vamps. There’s a medi-pak to the right on the top level. Go down the stairs. Head to the back area to the right next to the crypt. Jump on the tomb then on the crypt. Break through the grate and into the crypt.
Kill all zombies. You can bust open the little tomb doors. On the right side you'll find a holy water and a hellfire. Pick up the unlit torch on the left side of the passage way and light it. Then use the torch to burn the spider webs. Head through the hallway; no monsters will jump out at you.
In the next crypt, put the torch in the right torch holder and the cage will rise. Up the stairs and out the crypt, you'll see Kakistos. Objective complete. After a little banter, Kakistos decides to run, leaving behind an orb that resurrects the dead. Buffy fears it'll get her mom, who just happens to be buried right there. Spike is awakened by the hubbub and give you hand in this battle.
First kill all the zombies. They will stop coming after a while. Spike helps you out, but you should probably help him out to move things along quicker. There's a medi-pak in the back left corner, should you need it. Hit the orb when it looks dimmer than usual. Three or four hits should do it. Objective complete.