MAP20: Inexorable Opposition (Whispers of Satan)

MAP20: Inexorable Opposition is the twentieth map of Whispers of Satan. It was designed by Kristian Aro, and uses the music track "Churmen (A Simply Phobos E1M5 remix)" by Paul Corfiatis.

Walkthrough

 * Letters in italics refer to marked spots on the map. Sector numbers in boldface are secrets which count toward the end-of-level tally.

Secrets

 * 1) Open the wall directly to the right of the door in the room with the lava river to get cells and a computer area map.
 * 2) After going through the blue key door, open the corner wall to the left of the door to get some rockets.
 * 3) Where the yellow key is: open the right-hand wall for an invulnerability sphere.
 * 4) In the hallway leading to secret 1, look at the wall in front of you. The bit of wall next to a pillar can be opened for health bonuses.