E1M4: Fire (Elements)

E1M4: Fire is the fourth and final map of Elements. It was designed by Neal Ziring.

Secrets

 * 1) Near the start of the level you will go under three crushing ceilings.  There is a secret door immediately to the east of the southernmost one, leading to a plasma rifle (two in multiplayer), two stimpacks (one on hard skill), a shotgun guy (two on hard skill), and 4 shotgun shells (easy and medium skills only).  There is also another stimpack on multiplayer. (sector 163)
 * 2) In the south-west is a room with a red pentagon on the floor.  The wall between the two westernmost tall blue firesticks is a secret door leading to a teleporter to an area with a chaingun, a rocket launcher, an armor (easy and medium skills only), 4 shotgun shells, two armor bonuses, six health bonuses and (on medium and hard skills) the yellow key (on easy skill, the yellow key is in the pentagon room). (sector 204)
 * 3) In the south of the level is a staircase which rises upon going through a door at the bottom.  As the stairs start rising, immediately run to an alcove visible on the left - it contains a plasma rifle, a medikit (two on easy and medium skills), and a teleporter to a ledge with a switch which raises a bridge to a platform with some ammo and a medikit.  Note that if you do not reach the alcove in time, this secret becomes impossible to obtain. (sector 32)
 * 4) In the main central room north of the red door, before the floor to the north is raised, jump across to the eastern of the two corridors that lead north to reach a lava room with a platform with a staircase in the centre.  At the top is an armor (easy and medium skills only) and a soul sphere (two on multiplayer).  A teleporter here leads to the area east of the raising floor.  Note that this secret becomes impossible to obtain once the floor is raised. (sector 110)
 * 5) After taking the teleporter in #4, press the silver-textured wall to the south - it is a secret door, leading back to the main central room.  The door to the central room can be opened from either side, so this secret can still be obtained even after the floor is raised. (sector 170)
 * 6) In the north of the level is a room with a yellow door to the west.  Go through the door, then walk through a fire wall to reach a T-junction with two staircases.  Take the southern staircase - head north-east at the top until you see a dark corridor.  This leads, via a secret metal door, to a plasma rifle, two medikits (three on multiplayer), and an energy cell.  There is also a door leading back to the start.  There are two secrets here. (sector 293)
 * 7) See #6. (sector 184)
 * 8) From the T-junction mentioned in #6, take the north staircase, which leads to a dark area with a teleporter.  This teleporter leads to a short path with two health bonuses. (sector 87)
 * 9) Exiting #8 via the teleporter from which it was entered takes you to a room with four armor bonuses, two energy cells, and a soul sphere.  The southern wall is a door leading back to normal territory. (sector 300)
 * 10) In the final area with the Cyberdemon, the northern structure has a small patch of lava next to it.  It is possible to walk through the fire here then through a door, leading to an area with exploding barrels from which it is possible to shoot the Cyberdemon safely. (sector 138)

Bugs
If the crushing ceilings near the start are stopped too low, it is possible to get stuck in Secret #1.

Just before the final room are two glass floors, both with several monsters on them, that can be lowered by switches. However, approaching either switch makes the other one inaccessible in single-player, so only one of the glass floors can be lowered, and thus 100% kills is not possible.

The switch in the main central room is supposed to lower two platforms with monsters. The western one does not lower in easy skill, thus making the imps on this platform (things 87 and 89) unable to be killed in easy skill.

Easy skill: Max kills = 65/70 Medium skill: Max kills = 115/119 Hard skill: Max kills = 140/144

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

Player spawns
This level contains four spawn points:
 * 1) facing south-east. (thing 5)
 * 2) facing north-west. (thing 6)
 * 3) facing north-east. (thing 7)
 * 4) facing south-west. (thing 8)

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