This huge level will be your introduction to the spawn, a dangerous little blue blob of goo that bounces around and explodes when destroyed. Your best bet is to try and take them out as soon as you see them - and from as far away as possible.

Watch the scrags as they appear. Those stained glass windows on the far wall each lead to a small room

In the graveyard, there is a Quad Damage in one corner and a 100 health kit in another. If you don’t have a grenade launcher yet, these items will help you survive the zombie onslaught.

Secret Area 1
The second room full of scrags has a small pool of water with an elevator in the center. If you watch carefully when you enter, you’ll notice the scrags fly out from behind the stained glass windows. Ride the elevator up to the second level, then walk through the windows for some health.

This Quad Damage will be a big help in dealing with the undead menace in the graveyard

Secret Area 2
When you leave the second scrooge room, you will be in a series of blue hallways. Keep to the right, and you’ll come upon a star button on the wall. Press the button to descend into a large secret area filled with zombies.

Secret Area 3
Secret Area 2 has a large wooden elevator in the center. Step on the elevator, then immediately step back. Under it is a teleporter, which leads to some ammo and red armor.

This secret room is also the passageway to another secret area. Hop on the elevator, then quickly run back as it ascends to find a teleportert

The Silver Key
When you see the grenade launcher at the end of a long corridor, run down the hallway toward it, hugging the right wall. The floor will begin to recede into the wall, revealing a lava pit below. When you reach the end, a wall will open and you can grab the silver key.