It's best to be on the computer's good side in case it takes an interest in Skynet.
The world map shows a facility with several rooms; there'll be a stereotypical 'big computer room' somewhere.
Don't forget that you can click the spaceship in the top-right to mark all areas. ?
The computer is in the computer room just above the train station.
We've found the computer, but it's unwilling to authorise any train departures - it's activated 'Security Protocol 304' instead.
The computer itself will tell you, but it's a lockdown that's in effect until the 'situation' has been normalised.
We can't stop this protocol without resetting the computer, but a reset will be useless without messing with the servers first.
The servers are far away from the main computer - check out the world map to see if you can find the servers.
You'll find them in the server room on the upper-left side of the base.
It seems there's a trigger-happy idiot guarding the servers - do your best to not get shot!
There's a convenient trail of motor oil leading from the door to a barrel of 'stun gas'. Maybe we could set it aflame?
Well, we don't have anything that could start a fire right now, but could probably find something if we had a look around.
The people running this base may not be human, but they still wouldn't want smoke interfering with their machines.
Check places where smoking would be allowed. ?
The construction site!
After visiting the construction site, try to 'grab' the nearby hole in the wall to reach a useful area.
Your friends should help you inside - follow these hints if they do, or jump over to these hints if they don't.