MAP21: Hell's Gate (Perdition's Gate)

MAP21: Hell's Gate is the twenty first map of Perdition's Gate.

Walkthrough
You begin this map on the west ledge of a large pit seemingly floating in the middle of nowhere.

Deal with the two Revenant's around the corners in front of you and then run back over the teleporter you start the map on top of, to be sent to the west side of the pit in the middle, where several Imps and a couple of Arachnotron greet you.

Use the teleporter on the east side of the pit to be transported up to the east side of the ledge where you can find the blue key. A few bad guys teleport on to the podium in the middle of the pit, though they are there to distract you from the Arch-Vile that also teleports into the pit and will likely be to your side when you go back down there.

Head back down into the pit and take the west teleporter back to the west ledge and travel to and press the switch behind the blue bars in the north west corner. A Hell Knight will rise up to try to stop you.

This will open the north teleporter in the pit, which will take you to the north ledge and the yellow key. Bars will lower as you approach the key connecting the left, right and north ledged together. Head to the yellow bars in the south west corner.

The switch inside, again guarded by a hidden Hell Knight, will unblock the south teleporter in the pit which will take you up to the south ledge and the red key.

Approaching the key will lower bars and connect the south ledge to the other ledges. With the red key head to the south east corner and open the red bars. Behind which is the exit guarded by a hidden Baron of Hell.

Other points of interest
One can cause the hidden Hell Knights and Barron of Hell to appear by simply approaching the bars, without having to open them, allowing one to shoot them through the bars in reasonable safety.

Secrets
1. The area behind the blue key bars counts as a secret.

2. The middle pillar between the bars on the west ledge can be opened from the ledge side to reveal a berserk pack.

3. The right pillar between the bars on the east ledge can be opened from the ledge side to reveal a plasma gun or rocket launcher.

4. The right pillar between the bars on the north ledge can be opened from the ledge side to reveal an invulnerability sphere and some cells or rockets depending on the skill level.

5. The right pillar between the bars on the south ledge can be opened from the ledge side to reveal a soul sphere.

Current records
The records for the map at the Doomed Speed Demos Archive are:

Things
This level contains the following numbers of things per skill level: