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17 окт 1978 г. - Cave Johnson receives the answer to a letter titled "Human Enrichment & Testing Initiative, Resource Acquisitions" (Portal ARG)

Описание:

- October 17, 1978 > 1987
- Cave Johnson receives the answer to a confidential letter titled "Human Enrichment & Testing Initiative, Resource Acquisitions", describing the four types of Test Subjects and their behavior.

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Half-Life and Portal Universe Timeline

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17 окт 1978 г.
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