E2M1: The Crater (Heretic)

E2M1: The Crater is the first level in the Hell's Maw episode of Heretic.

Walkthrough
You begin facing a wall of hardened lava. Walk around this wall to find yourself in an outdoor area facing three passages. Only the middle one is open, so go through it. At the end of the passage, collect the Ethereal Crossbow and pull the switch. Backtrack and head through the second passage which is now open. You will find yourself in a cave with a pool of lava at one side. Drop into the lava and hurry around the central rock there to find the yellow key in a teleport. Grab it and you reappear near the start of the level. Head through the yellow door into another cave. The red key is on a rock at the north end of the cave. Hurry across the lava to grab it, then go back up the stairs. Cross the bridge and use the red key to open the exit.

Secrets

 * 1) In the northeast of the Weredragon cave, there is a wall that appears lighter.  Open it to find a secret chamber.
 * 2) After you cross the bridge towards the green door, backtrack and find a passage opened into the Weredragon cave.  Go through and you will find a secret chamber opened nearby, where you can collect bonuses, including a Bag of Holding and a Hellstaff.

No credit is given for finding this secret:


 * 1) Near the green key, there is a wall that has some brown stone at the bottom.  This is a secret door.