community chest 3, map 15 help

I'm so stuck trying to get to the secret exit.

I don't know how to remove the wall, just in front of the red skullkey in the (secret) room where you need access with the 3 keycards.

Darmuss said:

I'm so stuck trying to get to the secret exit.

I don't know how to remove the wall, just in front of the red skullkey in the (secret) room where you need access with the 3 keycards.

Actually, you're not supposed to obtain the skull key to reach the secret exit if you're playing the map normally. There's a bug in the Doom engine that must be exploited to reach it. Try exploring the place and experimenting some more.

Or open a map editor and seek.
It's the most accurate mean to find your way.

I've tried exploring without any luck.

Also looking with Doombuilder made me none the wiser.

There is one specific monster that must be spared if you want to reach the secret exit. Don't kill it at any time or you'll be unable to reach it.

ok, I got it.

I quickly killed him the first time...

thank you.