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jan 1, 1972 - Aperture Science constructs at least Chambers 01 and 02 of the Propulsion Gel Testing Facility. (Portal 2 - Trivia)

Description:

- 1972
- Aperture Science constructs at least Chambers 01 and 02 of the Propulsion Gel Testing Facility.

Added to timeline:

Half-Life and Portal Universe Timeline

ByThe Fancy Fedora
25 Dec 2018
1
0
8085

Date:

jan 1, 1972
Now
~ 53 years ago
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