This subject is related to a real world perspective.
This subject is related to the Black Mesa Incident era.

Chasm (multiplayer map)

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For other uses, see Chasm (disambiguation).

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Matthew Armstrong[1]


Half-Life: Opposing Force

Game mode(s)

Capture The Flag

Power-Up spawns




Chasm is a map in the multiplayer mode of Half-Life: Opposing Force. It was added in the Opposing Force CTF update.



“Nearby the rear entrance to the Black Mesa facility, a deep chasm rips between abandoned missile bunkers from the old base. When the soldiers attacked, a group of civilians holed up in the West bunker helping themselves to the arms and supplies there. Unfortunately, the soldiers had been using the East bunker as a command post. During the unavoidable battle, the soldiers (intent on eradicating the civilians who knew too much) were in danger of being eradicated themselves by the newly armed Black Mesa refugees.”
Opposing Force CTF Description


  1. Opposing Force CTF credits (op4ctf_credits.txt)