Okay so I've really enjoyed this game a lot but now I'm on the oil rig the reactor room is freaking missing. I tried watching some videos on how to finish the game but the one I saw had a full reactor room on the reactor floor. Mine doesn't have doors, a reactor, the scientist and I'm really stuck.

Should I have gotten the unofficial patch for this game to solve this problem or is it caused by something else?

Basically how do I finish the oil rig? I need to get the villagers out but am unable to because no reactor.

Thanks in advance.