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

Beschreibung:

- 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 Okt 1978 Jahr
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~ 47 years ago
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