I completed it and scanned the whole area... remaining the main exit in the upper floor at the middle bottom of the map
Wait, are you trying to find a key for the front door on the ground floor of the lab?Sorry to say, but there isn't a key for that door, you're supposed to just continue through the tunnel after the boss fight in the lab.
Boss what?
Where is this and is the tunnel?
The boss fight for the lab should be on the basement floor, at the top centre of the map. :)
