MAP22: 4-4: Io Refuelling Array (Headless Chicken)

Headless Chicken maps
Sticks & Stones 01 02 03 04 05 06
Troublesome Temples 07 08 09 10 11 12
Urbane Jungle 13 14 15 16 17 18
Suddenly Cosmic MAP19: 4-1: All Aboard! MAP20: 4-2: Turbulence MAP21: 4-3: Callisto Science Station MAP22: 4-4: Io Refuelling Array MAP23: 4-5: Mars Base MAP24: 4-6: Regolith
That Pesky Heck 25 26 27 28 29 30
The Funny Maps! 31 32 33

This level occupies the map slot MAP22. For other maps which occupy this slot, see Category:MAP22.

This article about a map is a stub. Please help the Doom Wiki by adding to it.

MAP22: 4-4: Io Refuelling Array is the twenty-second map of Headless Chicken. It was designed by Luca Pavone (Chookum) and uses the music track "Attack Ship" from Perfect Dark.

Walkthrough

Map of 4-4: Io Refuelling Array

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

Secrets

1. Use a wall southwest of the yellow key to find a passage leading to an invulnerability. (sector 55)
2. Jump southwest of the red key to the energy cell pack. Use the purple square to the north and shoot the target switch, then run south to the lift and take it up to a megasphere. (sector 57)

Speedrunning

Current records

The records for the map at the Doom Speed Demo Archive are:

Run	Time	Player	Date	File	Notes
UV speed
NM speed
UV max	7:27.43	Lucky_Edie	2026-01-29	hdlschkn22m727.zip
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on February 23, 2026.

Statistics

Map data

Things	4033
Vertices	8169*
Linedefs	7991
Sidedefs	15077
Sectors	1262

* The vertex count without the effect of node building is 6024.

Things

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

Single-player
Monsters	1-2	3	4-5
Heavy weapon dude	29	38	48
Imp	293	365	437
Lost soul	26	42	58
Demon	28	38	52
Revenant	53	62	80
Cacodemon	82	109	140
Pain elemental	4	6	8
Hell knight	40	59	78
Baron of Hell	21	30	41
Arachnotron	8	12	18
Mancubus	8	12	16
Arch-vile	5	6	6
Spiderdemon	1	2	2
Cyberdemon	6	8	9
Former lieutenant	240	292	350
Kamikaze	62	74	78
Chicken	1
Weapons	1-2	3	4-5
Chainsaw	1
Shotgun	1
Super shotgun	1
Chaingun	1
Rocket launcher	1
Plasma gun	1
BFG9000	1
Ammunition	1-2	3	4-5
Clip	32
Box of bullets	16
4 shotgun shells	48
Box of shotgun shells	5
Rocket	33	27	33
Box of rockets	92	96	96
Energy cell	52
Energy cell pack	29
Health & Armor	1-2	3	4-5
Stimpack	20
Medikit	60
Armor	1
Megaarmor	3
Items	1-2	3	4-5
Armor bonus	142
Health bonus	83
Supercharge	2
Megasphere	2
Backpack	1
Berserk	1
Invulnerability	2
Keys	1-2	3	4-5
Blue keycard	1
Red keycard	1
Yellow keycard	1
Miscellaneous	1-2	3	4-5
Exploding barrel	734
Teleport landing	55	55	57
Voodoo doll	11

Cooperative
Monsters	1-2	3	4-5
Zombieman	42
Shotgun guy	42
Heavy weapon dude	31	40	50
Imp	293	365	437
Lost soul	26	42	58
Demon	28	38	52
Revenant	59	68	86
Cacodemon	98	125	156
Pain elemental	14	16	18
Hell knight	40	59	78
Baron of Hell	21	30	41
Arachnotron	12	16	22
Mancubus	18	22	26
Arch-vile	5	6	6
Spiderdemon	3	4	4
Cyberdemon	11	14	16
Former lieutenant	458	510	568
Kamikaze	112	124	128
Chicken	1
Weapons	1-2	3	4-5
Chainsaw	1
Shotgun	1
Super shotgun	1
Chaingun	1
Rocket launcher	1
Plasma gun	1
BFG9000	1
Ammunition	1-2	3	4-5
Clip	34
Box of bullets	39
4 shotgun shells	70
Box of shotgun shells	14
Rocket	49	43	49
Box of rockets	206	210	210
Energy cell	116
Energy cell pack	112
Health & Armor	1-2	3	4-5
Stimpack	38
Medikit	146
Armor	6
Megaarmor	8
Items	1-2	3	4-5
Armor bonus	304
Health bonus	199
Supercharge	2
Megasphere	10
Backpack	10
Berserk	3
Invulnerability	6
Keys	1-2	3	4-5
Blue keycard	1
Red keycard	1
Yellow keycard	1
Miscellaneous	1-2	3	4-5
Cooperative start	4
Exploding barrel	734
Teleport landing	55	55	57
Voodoo doll	11

External links

• Headless Chicken demos at the Doom Speed Demo Archive