Invasion... Level 1: Contamination

Invasion... Level 1: Contamination
The starting area
Authors	Andy Chen, Claude Martins
Port	Vanilla Doom
IWAD	Doom
Year	1994
Link	Doomworld/idgames

This level occupies the map slot E1M1. For other maps which occupy this slot, see Category:E1M1.

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Invasion... Level 1: Contamination is a single-level PWAD for Doom that was released in 1994. It was designed by Andy Chen and Claude Martins, and includes a custom music track. It is set around an space station invaded by demons, with strong use of techbase map tropes. It was followed by Invasion... Level 2: The Upper Decks.

Contents

WalkthroughEdit

Map of Invasion... Level 1: Contamination

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.

EssentialsEdit

Other points of interestEdit

SecretsEdit

1. Go through the first door and turn right. Near the first armor bonus you reach are two alcoves. Pressing the western one opens up a secret door opposite leading to a passage with a shotgun guy and two health bonuses (on medium and hard skills only), and a megaarmor which lies on a teleporter to the south-east area. Both the passage to the teleporter and the teleporter itself count as secrets. (sector 27)
2. See #1. It is not possible to receive credit for this secret as the player teleports before stepping on the sector. (sector 28)
3. From the blue key, head east then south. Continue through a fake wall, at the end of which is a soul sphere. (sector 118)
4. Heading north from the blue key area, there are two passages to the west. Between them is a fake wall, through which is a partial invisibility and a lift leading up to a berserk. (sector 122)
5. The room with the teleporters leading to the red key area has a secret door on its north wall leading via a second door and a lift to the yellow key and a box of shells. Both the sector between the doors and the yellow key sector count as secrets. (sector 256)
6. See #5. (sector 179)
7. Head north from the blue key area then turn right at the end and right at the end of that path. Immediately on the left is a fake wall through which is a shotgun guy on a platform (on medium and hard skills) and a nukage pit down below, which contains a chainsaw as well as (on medium and hard skills) a medikit and a spectre (two on hard skill). There is a switch which causes the platform to lower, allowing you to jump across and out of this area. Note that entering this area activates a crushing ceiling. (sector 285)

BugsEdit

Because one secret cannot be achieved (see Secrets section), the maximum secrets percentage obtainable is 85%.

If the player goes through the teleporter in Secret #2, he will be stuck in the south-east area unless he both has the red key and has pressed the switch near the computer map.

Demo filesEdit

This WAD features three built-in demos by the authors. All require Doom v1.2 to view them. The demos are:

Demo	Skill	Tics	Length
DEMO1	3	3528	1:40.80
DEMO2	3	9820	4:40.57
DEMO3	3	16875	8:02.14

Areas / screenshotsEdit

• 

  The custom computer texture

• 

  Dining hall

• 

  Computer mainframe

• 

  Maintenance tunnels

• 

  Blue key area

• 

  Yellow key area

• 

  The hangar

• 

  Red key area

• 

  The exit

SpeedrunningEdit

Routes and tricksEdit

Current recordsEdit

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

Run	Time	Player	Date	File	Notes
UV speed	3:56.43	Serge Marudov (Never_Again)	2014-03-26	inv1-356.zip
NM speed
UV max	14:49.03	Serge Marudov (Never_Again)	2014-03-26	inv1-1449.zip
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on November 30, 2021.

DeathmatchEdit

Player spawnsEdit

This level contains thirteen spawn points:

1. facing south. (thing 227)
2. facing north. (thing 228)
3. facing south. (thing 229)
4. facing south. (thing 230)
5. facing south. (thing 231)
6. facing north-west. (thing 232)
7. facing south-east. (thing 233)
8. facing west. (thing 234)
9. facing west. (thing 235)
10. facing south. (thing 236)
11. facing north. (thing 237)
12. facing south-east. (thing 555)
13. facing north-west. (thing 568)

StatisticsEdit

Map dataEdit

Things	671
Vertices	1519*
Linedefs	1720
Sidedefs	2417
Sectors	389

* The vertex count without the effect of node building is 1347.

ThingsEdit

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

Single-player
Monsters	1-2	3	4-5
Zombieman	0	9	21
Shotgun guy	14	46	87
Imp	51	96	136
Demon	11	32	47
Spectre	0	8	22
Cacodemon	1	2	6
Baron of Hell	2	3	4
Weapons	1-2	3	4-5
Chainsaw	1
Shotgun	1
Chaingun	1
Rocket launcher	1
Ammunition	1-2	3	4-5
Box of bullets	21	21	22
Box of shotgun shells	42	59	60
Health & Armor	1-2	3	4-5
Stimpack	10	12	12
Medikit	22	31	31
Armor	2	1	0
Megaarmor	1	2	3
Items	1-2	3	4-5
Armor bonus	10	13	13
Health bonus	13	22	22
Supercharge	2
Backpack	2
Berserk	1
Computer area map	1
Light amplification visor	1	1	0
Partial invisibility	2
Radiation shielding suit	1
Keys	1-2	3	4-5
Blue keycard	1
Red keycard	1
Yellow keycard	1
Miscellaneous	1-2	3	4-5
Exploding barrel	16
Teleport landing	15

Multiplayer
Monsters	1-2	3	4-5
Zombieman	0	9	21
Shotgun guy	14	46	87
Imp	51	96	136
Demon	12	36	55
Spectre	0	8	24
Cacodemon	1	2	6
Baron of Hell	2	3	4
Weapons	1-2	3	4-5
Chainsaw	1
Shotgun	1
Chaingun	1
Rocket launcher	1
Ammunition	1-2	3	4-5
Box of bullets	21	21	22
Box of shotgun shells	45	62	63
Health & Armor	1-2	3	4-5
Stimpack	10	12	12
Medikit	22	31	31
Armor	2	1	0
Megaarmor	1	3	4
Items	1-2	3	4-5
Armor bonus	10	13	13
Health bonus	13	22	22
Supercharge	2
Backpack	2
Berserk	1
Computer area map	1
Light amplification visor	1	1	0
Partial invisibility	2
Radiation shielding suit	1
Keys	1-2	3	4-5
Blue keycard	1
Red keycard	1
Yellow keycard	1
Miscellaneous	1-2	3	4-5
Cooperative start	4
Deathmatch start	13
Exploding barrel	16
Teleport landing	15

External linksEdit

• Invasion... Level 1: Contamination at Doomworld/idgames
• Invasion... Level 1: Contamination at the Doom Speed Demo Archive
• Review at ONEMANDOOM: WAD Reviews