Hi, forum lurker here...anyways I'm surprised no one answered this yet since this is a very simple question, Hopefully someone posts before I do , English isn't my primary language so I apologize if I make a few typos. (I'll edit any I find after I post this.) .
If you want to prevent the excavator from decompressing any of the tunnels or the biodome, I believe only the player with the hacker can stop it. The player with the hacker must run all the way back to the QR machine and look and see if one of the machines are beeping green lights. When you find the right one glowing, hack