Anomalous Materials
Anomalous Materials is the second chapter of 
Half-Life.
It is the sector of Black Mesa that Gordon Freeman works at. The early part of the game leading into the Resonance Cascade is spent here.
Architecture
Anomalous Materials is composed partially of industrial materials (metal and lab equipment) and partially of domestic materials (tile and drop ceilings). Metal walls should be balanced with the concrete walls on the outer edges of the lab. The hallways have high ceilings, but not high enough for two full players on top of each other. Air ducts come out of walls and into others.
Environment
Lab equipment such as monitors and computers are common. There are occasional windows, as seen in the hallway leading towards the coolant reserve. Retinal scanners should be found near doors leading out of the sector to restrict access. Although it's a lab, break rooms should be found at least once a map containing a few tables, vending machines and trash cans.
The machinery in the facility should get denser as the player gets closer to the anti-mass spectrometer.
NPCs
The main NPCs players should find here are scientists and security guards. Security guards should mainly be used to restrict access to areas where retinal scanners wouldn't make sense or to add variety. They are never found entirely idle.
Scientists can usually be found typing on computers or studying data on whiteboards. They may also be found in the break rooms tidying up.
Maps
The following .bsps comprise this chapter.
- c1a0
- c1a0a
- c1a0b
- c1a0d
- c1a0e
NoteSome maps aren't ordered alphabetically start to finish. For instance, the first map in the chapter, c1a0, transitions to c1a0d.Notec1a0c is part of Unforeseen Consequences.Gallery
Front lobby
Hallway
Break room
The Anti-Mass Spectrometer
| Half-Life Chapters
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| Hazard Course t0a0 |
Black Mesa Inbound c0a0 |
Anomalous Materials c1a0 |
Unforeseen Consequences c1a1 |
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| Office Complex c1a2 |
"We've Got Hostiles!" c1a3 |
Blast Pit c1a4 |
Power Up c2a1 |
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| On a Rail c2a2 |
Apprehension c2a3 |
Residue Processing c2a4 |
Questionable Ethics c2a4d |
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| Surface Tension c2a5 |
"Forget About Freeman!" c3a1 |
Lambda Core c3a2 |
Xen c4a1 |
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| Gonarch's Lair c4a2 |
Interloper c4a1a |
Nihilanth c4a3 |
Endgame c5a1 |
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