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This article is for a fictional entity, and accurate to the lore of Half-Life. |
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Not to be confused with the Crowbar Collective's Half-Life remake; Black Mesa.
195?–200?[]
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| Half-Life (Opposing Force | Blue Shift | Decay | Source) | Half-Life 2 (Lost Coast | Episode One | Episode Two) | Half-Life: Alyx
Entities  |
| Games Portal (Still Alive) | Portal 2 Entities  |