Walkthrough: Buffy, the vampire slayer
Sunken Church Revisited
Tunnels
Talk to everyone (receiving an elixir, holy water vial, and hellfire arrows) and then hit the switch on the right. Head down the ramp and to the left. Break the boxes to find a stake. Look 180 degrees from those boxes to find a holy water refiller with boxes next to it. A stake is in the first one. Head to the opposite end and you'll find a lever. Next to the lever (in a box) is a stake. Pull the lever and you'll find a demon dog. Then put the holy water gun to use and break down the shield. A lumber jack will jump from the sky. Use the holy water and then go refill it. A demon dog and a vampire await your company, so use the holy water again and defeat those bastards. Go to the left and through the wall the beast created to find a hellfire vial. Head back out and down the ladder straight ahead. Go down the ramp and do a U-turn to the right. Break down the wall to find a vial of holy water. Turn off the middle and right switches (180 degrees from the secret) and walk across the fan area and hit the switch. You'll have to fight off a lumber jack.
Kill him (pushing him off the plank makes it a quick fight) and then go to the next room and save the man to get a holy water vial. There is a lumber jack and vampire in the room. Kill them and you can pick up the shovel in the pile of dirt (conveniently placed in a tunnel full of metal). Head left and jump onto the bar to the right hanging over the cliff. Slide to the right and onto land. Then jump to the other side and get out the water gun because its time to chop down a road block.
Go to the end of the hall and to the right will be a large pit. Jump from your side onto the small wood plank. Walk across that (very carefully) and at the end, for your reward, a lumber jack will greet you. In the hole he created, you'll find an elixir. To the left of the final wood plank, you'll find a holy water vial. Follow the path and head down the ladder to be greeted by a new enemy: the invisible demon. He jumps around and teleports, but he isn't too difficult (as long as he is fought alone and not with other enemies). He shoots fire balls that are locked onto you (heat seeking, if you will), but you can easily stop that from happening by kicking the sucker while he is summoning his magic. There is a bar along the far wall. Jump onto it and ride it to the other side. Hop off, then jump to the other platform. Then jump to the other side and you'll have a run in with a invisible demon. Keep following the path and another invisible demon will emerge. There is another blockade (with holy water as the key). After breaking it, walk forward and this mission is completed.
Fire Bridge
Keep walking forward and jump down to the platforms below. Once you reach the bridge, be careful as pieces will fall off from below your feet. If that weren't enough, an invisible demon comes a knocking. After him, another invisible demon comes. Don't these guys ever learn. Knocking them into the lava is the best way to combat these suckers. However, it might not be that easy of a task, especially since if you fall in, you have similar results to theirs.
There is a place to the right where you can refill your hellfire gun, as well as picking up a holy elixir, but I've only been able to get over there and not back. To get over there, find the closest section (a pointed rock) to the bridge and hop from the top of the bridge over to that object. However, the jump back isn't as easy. At the end of the bridge is a stone that lowers to your weight. However, it will rise when you get off. In other words, jump on and off quickly in order to make the jump to the higher level. There will be another one immediately following this one.
Ready for another leap of faith? Jump to the left of the platform and grab onto that small ledge on the other side. Climb up the blocks and jump across the two stair case sections that have been removed. Finally you are on solid land, however, two invisible demons greet you. Go to the far right and climb up the long, stone block. Then keep climbing up to higher levels until you enter the room where a red button is located to the left. Before hitting the button, head straight forward and go refill your holy water gun, as you can use it to defeat the next group of enemies. Hit the button and get ready to fight plenty of invisible and screaming demons. Go down and press the two buttons that are now available and go through the gate they open. Two screaming demons will appear, and then you can complete the mission by walking through.
East Wing
At the bottom of the stairs, the right wall will be breakable. A holy elixir is inside. Then head back and go through the hole on the right side. Climb to the other levels and, at the end, you'll find a holy water refiller. Head along the edge to the right of the refiller and you'll find another refiller, this time for the hellfire. There is a bar you can climb across, so jump onto it and do exactly that. After you get across, two screaming demons are there.
Climb up the ledge to the right and then press the green button on the left. After that, head along the all and jump onto the bar, taking you across to the other side again. Head down to the area where you made the hole in the wall and you'll be greeted by three screaming demons. Head through the open door and across the big pillar that lays across the pit. Three invisible demons will keep you company on the other side.
Walk around the outer edging (to the right of the pillar) and jump into the hole to find an elixir. After picking that up, turn around and look towards the lava. Below should be another pillar. Jump down to it and walk across it. Two invisible demons will keep you busy. After that, there are arrows to pick up at the far left corner of the room off some dead dude. After that, head up the blocks on the right side, until you encounter a screaming demon. Head through the unsealed door and climb across the bar on the left for the ground drops faster than Last Action Hero did in ticket sales.
Continue down the path and open the big, double door at the end. In this room, an invisible demon will jump out from the glass. Go through the glass he broke through and go to the top of the stairs. Two invisible demons will meet you there. Press the button on the right and head through the glass, to the right and through the doors that now open.
Main Hall
Head straight and to the left. Follow the path down until you approach the master. He'll send you into the Dreamer's Realm.