Headscratchers / The Complex

• The "secret" ending raises a number of questions. Who put the poison gas in the ambulance? Nathalie? The Kindharians? Was the driver in on it? Were they trying to kill Amy and/or Clare? And if so, why? It should be noted that on the first playthrough, players can choose the ambulance option with no consequences. Does that mean this ending is not "canon" to the rest of the game?
• If the player chooses to sacrifice Rees instead of Clare, Amy kills Nathalie, Emily and Parker and reveals to Clare that she works for MI6 and knew what Nathalie had done all along. So why didn't she reveal this information to Rees and Clare when they were trapped in the lab together? Once Malkin and the interns turned out to be traitors, Amy had much more important things to be concerned about than maintaining her cover.
  • She was probably concerned about any possibility of betrayal, even from Rees. Besides, telling them wouldn't have made any real difference at that point anyway. They would have still been trapped in the lab with 2 infected people and the interns on their way.