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Behind the scenes
- Stacking a few props makes it possible to climb on top of the Combine side entrance to the bunker. In addition to providing a good vantage point, this allows one to survive the airstrike outside the bunker unscathed.
- Using the "noclip" cheat reveals an otherwise inaccessible sewer tunnel between the docks and the drainage ditch. It was likely supposed to connect both areas for a better gameplay flow, as the drainage ditch is a dead end, but was left blocked off for some reason.
The Combine control panel used to call in airstrikes.