E3M9: Haunted House (Back to Hell)

E3M9: Haunted House is the ninth and secret map of Back to Hell. It was designed by David Seager.

Secrets

 * 1) After going through the first door, turn right. The alcove immediately on the right is a secret door leading to a medikit, an armor, a box of shotgun shells, and a teleporter back to the start. (sector 81)
 * 2) Go through the first door, turn left, go through another door, then go through the first door on your left. The switch on the western wall opens up two rooms, each of which counts as secret. One contains 4 shotgun shells and a backpack. (sector 75)
 * 3) The other room (see #2) contains an armor and a partial invisibility. (sector 77)
 * 4) After getting #2 and #3, go back through the door then step into the alcove in the south of the room. You will be lowered to a room with a stimpack and a box of shotgun shells. Approaching the latter lowers a section of floor north-east of the blue key allowing access to a passage leading to two clips, 4 shotgun shells, a shotgun, and 0-3 imps. There is also a teleporter back to the start. (sector 254)
 * 5) From the start, go through the door, up the stairs then turn right then left going up some more stairs. There is a wall on the right (near the top of the stairs) which lowers on pressing, revealing a chaingun and four boxes of bullets. (sector 218)
 * 6) Take the staircase opposite the one near #5. Continue north at the top - on the right is a secret door leading to a shotgun, a box of shotgun shells, a medikit, and a door back to the junction. (sector 121)
 * 7) The switch behind the blue door opens up a path to an outdoor area in the east. As you enter the outdoor area, turn left - there is a secret door on the south wall (marked with a green texture) leading to four health bonuses and a medikit. (sector 149)
 * 8) After entering the graveyard area, backtrack towards #7 - an area will have opened containing 0-9 imps, three lost souls, two medikits, and a box of shotgun shells (all bar the imps are on hard skill only). (sector 225)

Bugs
Secret #4 is accessed by lowering a sector (sector 253) next to the secret sector. The linedef action is 84 - WR lower to lowest floor (changes texture). This causes sector 253 to inherit the effect of the lowest sector, which is the secret sector (sector 254). As a result, a secret will be triggered on entering sector 253 if it is lowered before being stepped on for the first time. This results in 112% secrets being obtainable.

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

Player spawns
This level contains four spawn points:
 * 1) facing north. (thing 264)
 * 2) facing east. (thing 265)
 * 3) facing east. (thing 266)
 * 4) facing north. (thing 267)

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