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Half-Life Hints
How do I get the fuel/oxygen started?
1 of 5: Once you have gotten past the fan and followed your way around through the ventilation system, you will come to a room with 3 zombies, 1 headcrab, and many pipes.
2 of 5: After taking care of the aliens, you will notice a control panel on one side of the room.
3 of 5: There are two buttons on this control panel. One is for fuel, and one is for oxygen.
4 of 5: Be sure to push both of them. Each light will be lit once you press the respective button.
5 of 5: Each of the pipes will now have bubbles flowing through them, if you need added confirmation.
