
Afterward, return to the Greenhouse Control Room to disperse the Herbicide. Now you can enter the Low Temp Lab and cool the Herbicide. Now just put the signal modulator in the switch box and the power will turn on. Examine the Signal Modulator and switch to the 3 letter frequency, then fine tune with the left and right stick until everything lines up. Take the Signal Modulator to the switchbox in the dark hallway before Low Temp Lab.

Follow the area all the way to the end and you’ll find a Signal Modulator (on 2nd playthrough the signal modulator is where you activate the bridge immediately after getting the general staff keyband). You’ll notice the door to the Low Temp lab doesn’t open.

*Green = Left, Red = Middle, Blue = RightĪfter this you just need to cool the Herbicide in the Low-Temp Lab in the basement (enter via Ladder in Greenhouse).

Laboratory CodesĢ048 & 5831 (B Scenario) Herbicide SynthesisĪ-Scenario: Red, Green, Blue, Red, Green, Blue, Red, Greenī-Scenario: Blue, Red, Green, Red, Blue, Red, Blue, Green, Blue, Red, Green After entering both codes the Drug Testing Lab will be fully unlocked and you can use the machine there to synthesize the Herbicide. For the code terminal in the Control Room, imagine the blue alien letters were numbers on a keypad or phone.
